Attachment, Relationships

Why You Keep Choosing the Same Type of Partner

23 September 2026

They swore, after the last one, that they were done with unavailable partners. No effort to make plans or cancelled ones, warmth and closeness that arrived and then vanished, a relationship that felt urgent from the outside and starved from the inside. 18 months later she was describing someone new to a friend over coffee, using almost the same three adjectives she had used for the last one, and neither of them noticed until that friend, gently, pointed it out.

Most people have a version of this. By the way, not always romantic; it shows up in friendships and jobs too, a boss who reminds you of someone, a friendship that runs the same hot-cold cycle as the last one. The common explanation is either fate ("this is just my type") or self-blame ("I keep making the same mistake"). Neither is really right.

John Bowlby, the psychiatrist whose work is the basis for attachment theory, used the term internal working model for the mental template a person builds early on, from how care was given: how reliably someone showed up, how distress was met, what closeness generally cost. That template does not stay filed away as a memory. It operates as a live filter on who feels right, often faster than conscious evaluation runs. A partner who fits that template can register as chemistry within minutes, not because the fit is good, but because the nervous system recognises the shape and reads recognition as safety, even when the shape itself was never safe.

This is not nonsense. Longitudinal research on attachment provides real, moderate support: a large meta-analysis by R. Chris Fraley found attachment patterns correlate across years and decades at roughly .25 to .39, meaningful continuity, not the noise of chance, but nowhere near fixed.

That is the honest reading: *a template that shapes what feels familiar, not a script that decides who you end up with. *Plenty of room sits inside that gap, and it is where change actually happens.

The familiarity bias is worth naming plainly, because it explains the part that confuses people most: why the wrong-fit partner can feel more compelling than the steady one. Predictable warmth, offered without the work of winning it, can register as boring rather than safe, simply because it does not match the template, which is often relating to excitement. Someone whose interest has to be tracked, earned, or half-guessed can feel electric, because the nervous system is doing familiar, effortful work it recognises. That is not proof of a deeper connection - believe me, it's not. It is often proof of a familiar pattern doing exactly what it learned to do - not necessarily proof of a healthy pattern.

None of this means one should settle for less spark, and it is not a verdict on any one relationship someone is in now; a template is a pattern seen across a life, not a diagnosis of a specific partner, and what any particular relationship means is a conversation for the two people in it, not for a blog post.

What is worth asking, honestly, is what the spark is made of. A useful, low-stakes check: notice the relationships that arrived fast, that felt like finally being understood within weeks, and ask what made them feel that certain, that soon. Often it is a specific quality of anxiety, the low hum of needing to manage the other person's interest, mistaken for attraction because the two can feel identical from the inside.

The template is not the enemy and it did not appear by accident; it built itself sensibly out of whatever was actually available early on in childhood. The useful move is not to override it by force or distrust every strong pull. It is to notice, calmly, when a familiar shape is arriving, and to give the decision an extra beat before treating recognition as a verdict. That single pause, repeated enough times, is most of what changes the pattern, more than any amount of analysing ex-es ever does.

If a pattern like this keeps showing up in your relationships and you would like to look at it properly, rather than in the margins of a blog post, book a free 15-minute intro call, in English or German.

We will talk about what the pattern looks like in your life, not solve it in 15 minutes, and you will leave knowing, whether working on it together makes sense.