Do people just forget about you?

I read that a lot of people say If they really missed you they’d contact you and probably forgot about you etc.. but I don’t find that to be true. You can miss someone and have to big of an ego or think the relationship was too toxic to do that again.

And personally when I’ve broken up with someone no matter what the circumstances are I think about that person a long time afterwards, how does someone just “forget”?
Do people just forget about you?
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