How to get over trust issues from a past relationship

EQTiger Editorial · Sources checked 2026-10-26 · Expert review pending

When the alarm goes off for someone who isn't here

Rowan is eight months into a relationship with Beatriz. Her last partner spent a year saying "working late" while seeing someone else. On a Wednesday in October, Beatriz texts at 6:30: "Working late, sorry, home by nine." Nothing about the message is odd. Rowan's chest tightens anyway, and by 7:15 she has looked at who Beatriz follows on Instagram and checked when she was last online. Beatriz is, in fact, at her desk.

That is what trust issues from a past relationship usually feel like from the inside: the feeling arrives before any thought, and it is attached to particular words, times of day or situations that meant something the last time.

There is a reasonable explanation for why it works this way. In a two-part study, people described a past partner and were later introduced to two potential dating partners on paper. One of them had been built to resemble the person's own ex. People expected the same things from both, but more so from the one who resembled the ex, and they felt more anxious toward that one (Brumbaugh and Fraley, 2006). It was a lab study of strangers described in writing, not real dates, so it shows the tendency rather than its size. It suggests your reaction to "working late" is partly a reaction to your ex.

Two lists: what this person has done, and what the last one did

Before you talk to anyone, spend fifteen minutes on this with a pen. Draw a line down a page. On the left, write what your current partner has actually done, as plain facts. On the right, write what your ex did. Then mark anything on the left that you only know because you went looking.

Here is roughly what Rowan's page looked like:

When the two columns look this different, the feeling is mostly an echo. When the left column starts to look like the right one (vague answers, hidden phone, stories that change), you are looking at evidence, and the next steps are different. Why a partner lies about small things and rebuilding trust after cheating cover that case.

Keep the page. On a bad night it is easier to read a list you wrote on a calm day than to argue with your stomach.

What one study says about carrying it into the next relationship

One study followed 484 adults through two romantic relationships in a row. People who knew their first partner had been unfaithful were twice as likely to report that their next partner was unfaithful too. People who had only suspected their first partner were four times as likely to suspect the next one (Knopp and colleagues, 2017).

Both halves are worth sitting with. The first means your caution is not irrational: something about who we choose, or what we put up with, can repeat, and noticing real warning signs early is worth something. The second means suspicion itself tends to travel with a person from one relationship to the next. The study could not tell whether that was because people picked similar partners, watched more closely, or carried the suspicion forward regardless of how the new partner behaved. It is one study of people in mixed-gender relationships, and it counted sexual involvement only.

The practical reading: take your history seriously enough to watch for real patterns, and seriously enough to notice when the watching is the pattern.

Telling your partner the short version

You don't need to tell your whole story, and the first few dates are not the time. Once things are serious, and ideally before the next trigger rather than during it, give your partner three things: one or two sentences of history, the specific things that set you off, and what helps.

My last relationship ended because he was seeing someone for a year and covering it with "working late." I know you're not him. But when you text that you're working late, my body reacts before my brain catches up.

What really helps is if you tell me roughly when you'll be home and text if it changes. That's it. I'm not asking you to check in all night.

If I go quiet or get short with you, it's probably that. You can ask me, "Is this the old thing?" and I'll tell you honestly.

What tends to backfire is asking a new partner to pay for the old one's behavior:

After what happened to me, I need to see your phone whenever I ask.

That request turns your partner into a suspect for something they didn't do, and it usually makes the anxiety hungrier, not calmer. Once both of you are caught in it, the loop between jealousy and checking is hard to break from either side.

Winding the checking down, one habit at a time

Checking feels like it protects you. In practice it gives you a few minutes of relief and a fresh set of ambiguous scraps to worry about. You don't have to stop everything at once.

1. List every check you do for a week. Instagram following, last seen, location, their calendar, their phone. Most people are surprised by the count.
2. Pick the one you do most and add a 20-minute delay. When the urge comes, set a timer. When it goes off, decide again whether you still want to look.
3. Write down the scrap you were hoping to find. "Whether she's really at the office." Then ask whether any check could actually answer it. Usually none could.
4. After two weeks, drop the delayed check entirely and pick the next one.

If most of the checking happens inside your head, as replayed texts and rehearsed arguments at 1 am, how to stop overthinking in a relationship has tools for that version.

Why reassurance helps tonight but confidence changes the pattern

Reassurance from your partner is useful, and you can ask for it plainly; how to ask for reassurance without it becoming a test has the words. It has a limit, though. A review of attachment research proposes that a partner's soothing responses protect a relationship in the moment without necessarily changing a person's underlying expectations, and that attachment anxiety eases most in situations that build a person's confidence in themselves (Arriaga and colleagues, 2018). That is a model drawn from earlier studies, not a tested program, but it fits what people describe: the turning point is rarely the hundredth "I'm not going anywhere." It is more often the day you realize you would be all right even if they did.

So invest on your side too. Keep your own friends and plans. Do things you are good at. Notice the evenings you got through without checking. If you want to understand where your own sensitivity fits, what attachment research does and does not support is a more honest guide than most online quizzes.

If you are dating someone with trust issues from an ex

You are not responsible for what their ex did, and you also have more influence than you might think. A review of couple studies describes how partners can buffer an insecure person's reactions with specific, steady behavior, which helps that person feel better and act more constructively in the moment (Simpson and Overall, 2014). The behaviors are unglamorous:

• Be predictable about the trigger topics. If late nights are the sore spot, say when you'll be home and text if it changes.
• Volunteer before you're asked. "Drinks with the design team on Thursday" costs you nothing and saves an evening.
• Answer the question, then name the old thing. "I'm at the office. Is this the old thing?" is kinder than defending yourself.

You can also set a limit. "I'll always tell you where I am. I won't hand over my phone every night." That is fair, and staying warm while you say it matters more than the exact wording.

When it is more than an echo

Get help from an individual therapist if the checking takes hours a week, if it has ended more than one relationship, or if you can't tell any more whether your partner has done something wrong. If your past relationship involved being threatened, controlled or hurt, the alarm may be about safety rather than fidelity, and a therapist who works with trauma is a better fit than a general dating guide. If what frightens you is your current partner, not the memory of an old one, start with hard situations and safety. For the rest of the trust pages, see the trust and security section of the Relationship Center.

Start with the free EQTiger assessment (adults 18+), or go back to the Relationship Center.