I broke up with my boyfriend and I think of getting back together.

I recently broke up with my 20m boyfriend, I’m 21f, after 4 months because I was scared. I always thought I would find the one in my later 20s tbh. So I looked for things wrong with him to break up, I know, I’m terrible. But he still wants me even after I explained my whole thing to him. But I’m still just scared that we’ll end up like my parents who started young and ended up resenting each other. It’s also scary because he has mental health issues and doesn’t go to college yet. So part of me thinks he should work on himself first and then we’ll get back together. Like we both just need self growth yk. But he doesn’t want that. He believes I need to be either here in the moment and grow with him or just leave. I understand cheat he means about leaving and not coming back because he has past trauma of a girlfriend doing that. Where she just left and decided to come back once she was bored. He’s the sweetest guy I’ve ever met and is everything I would want in a guy which is why I’m so conflicted. It’s like I want to be back together with him but I’m a very science based girl (my major is science) and get scared when statistics don’t look promising. That and my family doesn’t want us to get back together because they think he’s going to drag me through the mud with him. I don’t think he would ever do that on purpose since he cares about me a lot and is actively trying to better himself for me. Long post I know but any advice helps!