Yeah, but it's also a judgment versus impulse situation.
Once people break up, they tend to over-romanticize the good times out of nostalgia and because they miss the dopamine hit from being together, while forgetting about all the things that led to break them up in the first place. So they go into it thinking "Oh, well this time it will be different", but it's almost never different. All of the reasons why you broke up in the first place will still be right there, sitting like landmines, waiting to blow up in your face all over again. And then you'll break up again, be miserable again, and probably stupidly want to get back together again.
Constantly chasing after old failed relationships is a pretty good formula for never being able to move on and actually develop new, worthwhile relationships. It's not a healthy mindset, and it will almost never pan out for you in a positive way. Just because you've idealized a relationship after the fact doesn't mean it was "meant to be" or you're somehow obligated to spend the rest of your life trying to recapture it or fix it. Not letting go is the thing that makes you miserable, not the mere absence of that specific relationship.
And there are other negatives involved when you're coming back into a relationship that has already broken (depending on the specific people involved). Short of a relationship that broke up entirely due to causes beyond the control of either person (like, say, both people have jobs/college halfway across the country and they decided they couldn't make a long-distance relationship work, but now circumstances have changed and they can get together again), you are almost ALWAYS better off not getting hung up on past failures. Move on. Be happy.
Pretty much. Unless you know for a fact that whatever issues led to the breakup in the first place have been resolved (which is really only possible if the issue is something objectively measurable or entirely on your end), you're almost certainly going to be better off not trying to rekindle things.
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