my bf (M27) was obsessed with me, but now I (F20) feel like a bro to him

When we first started dating I (20F) straight up told him (27M) my one and only ex traumatized me and that I basically hated men. We had both recently broken up and not looking for anything serious so we just went with it and he said he didn't mind and he was hoping to prove to me that he was different.

Almost a month in he asked to be exclusive, I wasn't really in it emotionally and didn't mind so I said yes. Days went by and he was trying really hard, as I suppose all men do, and I start liking him, and feeling safe around him.

I start having an episode of let's-call-it depression for months, wasn't the girl he used to know, but he stuck with me and put in effort. Btw, I tried to break up with him multiple times due to trauma triggers and mental health, but he fought almost every time. I appreciate him, very much, but here is where the question lies.

He told me he wouldn't fight for us if I broke up another time. I've now started taking antidepressants, went back to normal, but this guy is now not putting in as much effort. I told myself not to break up again, as much as I feel disrespected by certain things he does, for a few more months to see if he changes. If he's under stress now or if he doesn't feel secure enough yet. He isn't terrible, but he's not up to my standards and I'm not in the mood to complain and mess up the dynamic. When he would tell me he loves me and was acting the way he was, and therefore making me like him more and more, is that fake and only for the early stages?

As I said I'm young and not very experienced. Please share your opinions on where I went wrong, how to be better, and tell me if guys like him can actually love lol