Has it ever happened to you that a person keeps popping into your head even when you’re not trying to think about them? You can be busy with work or distracted by other things, but they still cross your mind. And then it starts happening often enough that you start noticing it instead of brushing it off.
The thing is that this sometimes happens without any obvious feelings for the person in question. And even if you try to figure out why they keep coming back to your mind, there is not always an obvious reason.

This can be related to how things ended, or didn’t
Psychology may have the answer of why a person keeps coming back to your mind. Back in the 1920s, psychologist Bluma Zeigarnik noticed something interesting while observing waiters in a café in Vienna. They could remember every detail of orders they were working on without writing anything down. But as soon as the bill was paid, they forgot everything.
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