I broke it off...

My fiancé and I got into a huge fight yesterday, it started in the morning, I thought we got through it but then in the afternoon he was mad again. He told me I never support him, I always bite his head off, I always over complicate things. We have a newborn baby he just turned a month old and I've been staying at my sisters house because she has an extra car she lets me use for his appointments but only at her house. Anyway, my fiancé comes on his off days and some nights depending on when he works. So basically all week it's just me by myself taking care of the baby. When he does come he only watches the baby overnight so I can "sleep" but I still don't sleep between the baby crying and having to pump. Yet he absolutely refuses to help during the day because that's "my turn" even if I just need him to go get a bottle warmed or change his diaper. He does it eventually but he gives me so much crap before he does. I try to show him how to carry the baby while he goes and gets a bottle ready instead of letting him cry. Or how to properly put on a diaper because it seems that every time daddy puts the diaper on he pees out of it almost immediately. I thought I was helping. He's never even held a newborn before our son. I've been around kids and babies my whole life. But he kept making me feel bad about what I thought was being helpful, and I told him I wasn't someone that could be submissive. We have been together three years and I have always been one to stand up and speak my mind. I told him I always accepted his stubbornness and I've always loved him through it. But when I asked if he could accept my strong will, he said he didn't know. I told him until he figured it out he should only come to see our son but I would remove my ring, I can't be with someone that can't accept me. After three years. The whole argument seemed really random we had been fine for months we haven't argued, normal squabbles, but nothing big. So I invaded his privacy, something I never ever do I trust him with everything, but I found some messages from one of his exes on Facebook and they seemed innocent enough but I know him and talking to her would bring back some old issues we had previously. I'm heartbroken. I'm alone. And he can barely be bothered to respond to a text pertaining to our son. He didn't even say anything when I told him I was taking off my ring. I love this man but I can't be taken advantage of. Or not accepted for being me... right? Sorry this is so long I just needed to vent.