I also find concerning that every time he says it’s over , relationship resumes because you just run to each other. So just because it’s convenient? It’s not even deliberate?

I also wonder what kind of things you two do together? Do you have a lot in common? You go places and do things as a couple? You mentioned he comes for sleepovers but what else takes place in this Union?

As about marriage, he certainly isn’t marriage material but even if he was, has he expressed interest in marrying you? You might be with him because you hope to get married, but he might have zero plans about marrying you. He sure doesn’t act like he plans anything like that at all