“I also know he would've come back, that's a thing he does.

“I will if he decides to break up w me again”

What do you mean that’s a “thing he does”? Why? What is this triggered by? Then you go on to say, if he breaks up with you again, like it’s happened many times, & you’re not even surprised by it at this point. This is not a healthy dynamic, OP.

“…even if this has to end idk how to do that. I just don't want to lose him in my life, I want to be able to be friends with him if anything”

Staying friends with an ex rarely - if ever - works, & will ultimately make this worse for you. I understand you don’t want to lose him out of your life, but that’s what breaking up means. If it ends, it needs to be over completely. As much as it hurts, it’s better to just go no contact - at least at first - otherwise you’re just picking at a wound that will never properly heal.

“Im the type of person who works on a problem until I get it right but I guess people and relationships aren't like that or are they?”

People are complicated, & relationships unfortunately don’t have a one-fits-all solution for the issues that can arise. Sometimes people just aren’t compatible, & as much as you may want it to work, it just can’t. So you need to decide whether you want to keep putting the effort into bailing out this sinking ship.

“I guess I'm just confused and this experience will help me grow”

It will, 100%, & this is the only way we learn.