When your partner grows in another direction: differentiation in a long relationship

Ten years ago the two of them could talk until three in the morning. Today your partner runs half marathons, listens to podcasts you don’t understand, and comes home from work with a light in their eyes that you didn’t switch on. Or it may be the other way round: you are the one who is growing — new skills, new questions, a new way of seeing the world — and in the evening you sit beside someone you love, but more and more often the only thing you talk about is who is picking up the child tomorrow.

“We’re growing apart.” I hear this sentence often in the therapy room — and almost always with despair, as though it were a diagnosis of the end. Yet the research on long-term relationships tells a different story: growth in itself does not endanger a relationship. What endangers it is growth that stays unspoken — and a difference that nobody touches any more.

In this piece I set out when partners growing differently is healthy (and even an engine of intimacy), which signs tell you that difference has turned into distance, and what the two of you can do to grow in your own directions — together.

Growth is not the threat. Unspoken growth is.

Let’s first clear up a basic misconception: the idea that a healthy couple grows in step, like two trees sharing one crown. In truth they never grew in step — not even at the start; being in love simply covered the differences over. Two people who live forty or fifty years side by side will each go through their own crises, their own discoveries, their own transformations. Expecting to be at the same point the whole time is a recipe for disappointment.

The psychologist Eli Finkel and colleagues (2014) point out that we expect more of modern marriage than any generation before us: a partner is meant to be lover, best friend, companion in personal growth and co-author of meaning all at once. Those expectations can be met — but not in passing; they call for deliberate investment. When the investment isn’t there, what follows is not an explosion but something quieter: each person grows in their own direction and neither reports it to the other.

And that is precisely the breaking point. Growth that is spoken — “something is changing in me, let me show you” — invites your partner along, even if they won’t walk the same path. Growth that stays unmentioned creates a parallel world: new acquaintances, new thoughts, new pleasures the other person knows nothing about. Years later two people wake up in the same bed as polite strangers. Not because they grew — because they stopped telling each other.

Signs that difference is turning into distance

How do you tell healthy difference from quiet drifting apart? A few signs I pay attention to:

• New interests, no interest from the other. It isn’t a problem that your partner climbs and you paint. The problem is when nobody asks any more: “How was it?” — and when you stop telling each other what excited you, hurt you or changed you this week.
• Conversations are purely logistical. Schedules, bills, children, the bathroom renovation. All of it important — but if it is all there is, the relationship has become a well-run company in which no heart is employed.
• “I don’t know you any more.” A sentence that tells you a great deal of unspoken change has built up in your partner — and that you no longer dared, or wanted, to ask.
• Growth is hidden or apologised for. If you have to play down your new pleasure in front of your partner (“it’s nothing special”) or defend it as if in court, there is no longer room between you for two whole people.
• Other people know more than your partner does. When you tell a colleague, a friend or your followers about your inner world sooner and more willingly than the person you live with.

None of these signs is a verdict — but each is an invitation to stop while the distance can still be bridged. With the couples I work with I notice something else too: distance almost never arises from a single event. It arises from hundreds of small moments in which one partner reached out a hand — with a question, an invitation, a small piece of news about themselves — and the other didn’t take it, because they were tired, preoccupied or hurt. Gottman’s observational data call these moments “bids” for connection: couples who stayed together and satisfied responded to their partner’s bids far more often than couples who broke up. Growing in different directions, then, only becomes dangerous when these small responses dry up — and the good news is that you can start returning them today, without a single big conversation.

Schnarch: difference is the engine of intimacy, not its enemy

The clinical psychologist David Schnarch, author of Passionate Marriage (1997), said something about long-term relationships that sounds provocative at first hearing: marriage is not a machine for comfort but a “people-growing machine” — a natural process that forces both partners to grow, like it or not. And for Schnarch intimacy does not grow out of similarity but out of the capacity to remain who you are alongside your partner — even when the two of you differ.

The central concept is differentiation, which Schnarch carries over from Bowen’s family theory into the couple’s bedroom: the ability to hold on to a clear self in close proximity to another. A poorly differentiated couple cannot bear difference — every change in a partner is experienced as a threat and they try to stop it (“that yoga of yours again”), or they avoid it by accommodating until one of the two disappears as a person. A well-differentiated couple, on the other hand, can hold difference: I can say who I am and what is changing in me, and survive your unease about it; I can hear who you are becoming, and not fall apart. Only then is intimacy real — because revealing yourself to someone you need for your own balance is a risk few people can afford. That is why Schnarch says nobody can be more intimate in a relationship than they are mature. What differentiation means and how it is strengthened I have described in more detail in the piece on differentiation.

From this angle a partner’s growth is not a betrayal but a challenge to your own: an invitation for you to take a step forward too — in your own direction. Couples who manage it report something unexpected: after years of “growing apart” they can fall in love again with someone who has meanwhile become someone new.

When difference really does become dangerous: contempt

There is, however, a point where difference turns into something else — and here the research is relentlessly clear. John Gottman, who spent decades observing couples in the laboratory and predicting the breakdown of relationships from their interactions with astonishing accuracy, put contempt first among the four most destructive patterns (criticism, defensiveness, stonewalling, contempt): eye-rolling, mockery, sarcasm, looking down on the other. On Gottman’s data contempt is the single strongest predictor of divorce — because it doesn’t say “I disagree with what you did”, it says “you as a person are worth less”.

And this is exactly where growing in different directions can go wrong. As long as partners look at their differences with curiosity, or at least with respect (“your climbing isn’t for me, but I can see what it means to you”), the difference is healthy. But once condescension creeps into the tone — “you and your podcasts”, “still busy with those little flowers of yours?” — a change of category has taken place: from “we’re growing differently” to “my growth is worth more than yours”. The partner who is growing starts to see the one who (apparently) stands still as a brake; the one standing still sees the one who is growing as a show-off. Both feel alone.

If you recognise contempt in your conversations — in your own mouth or your partner’s — no shared hobby will resolve it. This is a sign to stop in earnest: contempt is generally fed by long-accumulated resentment and unspoken needs, and that is precisely why it is one of the clearest signals that it is time for help from outside.

How to grow together-apart: three bridges

The good news: couples who each grow in their own way and stay close aren’t performing magic. They build three kinds of bridge.

The first bridge: curiosity about your partner’s world. You don’t have to run a half marathon. But you do have to ask what it was like at the start line — and listen to the answer as something that interests you, not as a report. Arthur and Elaine Aron and colleagues (2000) showed experimentally that experiencing something new and stimulating together significantly increases relationship satisfaction — the self-expansion we otherwise seek in our own growth can also be experienced by a couple together. Sometimes it is enough to step into your partner’s world as a guest once a month: come to their race, read the book they are reading, try an hour of the thing that gives them joy.

The second bridge: shared rituals. Growing in different directions is safe as long as there are fixed meeting points — dinner without phones, a Sunday walk, a conversation at the end of the week with a single question: “What’s going on inside you this week?” Rituals are the bridges along which two growing people regularly carry news from their own worlds. Without them, even healthy growth quietly turns into parallel lives.

The third bridge: negotiation out loud. One person’s growth always costs them both something — time, money, redistributed tasks, a changed balance. Healthy couples negotiate that cost openly: “I train three times a week; what does that mean for you and what can I give in return?” Unhealthy couples charge the cost in silence — and resentment grows faster than either of them. If saying your needs and boundaries out loud is hard for you, start with the piece on how to say what you think without the relationship falling apart.

When to go to couples therapy

Couples therapy is not the last stop before the solicitor — it works best while there is still enough goodwill between you to sit on the same sofa at all. Consider it when the same conversation about distance keeps repeating and always ends the same way; when one of you experiences the other’s growth as a threat and you can’t untangle that on your own; when contempt has settled into the tone; when you live like good flatmates and it quietly hurts at least one of you; or when you know you would have a great deal to say to each other but can no longer find the language.

It may help to know this as well: “we’re growing apart” is one of the most common and most rewarding reasons for coming to couples therapy. Not because it is easy, but because behind the distance there is generally not a lack of love but a lack of language — and language can be built back.

In couples therapy we do not look for a culprit and we do not rule on whose growth is the “right” one. We create a space in which each partner can say out loud who they have become and what they need — often for the first time in years — while the other hears it without having to defend themselves straight away. I offer couples therapy as part of my services; if the two of you recognise yourselves in this piece, you are welcome to come together, and even if your partner doesn’t want to (yet), a first step can be an individual conversation about what is happening to you in this relationship.

And if you really have outgrown each other?

Honesty calls for this chapter too. Sometimes a couple discovers, with help, that the distance is not the result of neglected bridges but of two people having developed at a fundamental level in directions that no longer meet — in their values, in what they want from life, in who they want to be. That too is a legitimate outcome, and it too is not established overnight; as a rule only after you have genuinely tried to build the bridges.

If that is the case, the end of the relationship is not proof that the relationship was a mistake — the years of growth you made possible for each other remain real. Separation is then a process of its own, with its own grief and its own new beginning; I have written about how to walk through it in the piece on divorce and separation as a new beginning.

Most of the couples I meet, though, are not at that point. Most are at the point where two people still want to reach each other — they have simply stopped telling each other things. And that can be repaired. Tonight you can begin with a single question you haven’t asked for far too long: “Tell me, what really gives you joy these days?” And then listen the way you would listen to someone you are only just getting to know. Because in truth you are.