relationship

Idk what to do anymore I need advice. My boyfriend and I have been together for a year we have broken up twice in our year due to him needing to figure out what he wants. Cause his ex wife tries to come back in the picture. He has custody of the two kids that they had together and she hates me cause they call me mommy. So she tries anything to get me out of the picture. And here in July I lost my first baby at 9 weeks pregnant he didn't care but ever since then it just seems like we constantly fight it's either about money or I'm doing something wrong when it comes to disciplining the kids. I think we fight more than we have any good days. I just don't want to to do. If I should just give up for good this time or what?