Break up

Just needing to vent. So my BD and I have been together for almost 4 years. We have a 1 year old. During the relationship there has been a lot of fighting, cheating, screaming, name calling, pettiness, etc. I mostly take care of the house financially. I tried to work things out because he’s actually very involved with the baby so I wanted the baby to grow up with his father but I found myself being miserable in my own home. Now, my mom lives with us and has always helped with childcare which I’m beyond grateful to her for that. Last month, I finally broke it off because I was exhausted mentally and emotionally but obviously he didn’t have anywhere to go. So I agreed for him to stay on the first floor and we’d just strictly co parent until he finds somewhere else to go. Well he has made it difficult because he’s been begging for me to take him back and doing all this extra stuff and tbh I just find it annoying more than anything and he’s not making it easy. On the other hand, I’m starting to find myself resentful towards my mom because they start acting like they’re besties and she’s always throwing comments like “oh I feel bad for the baby”, “he’s good to him” and so and so. It hurts and it’s annoying especially because she went through something similar with my dad so I thought as her daughter she’d side with me. Also, she has been so controlling and it’s driving me crazy especially because I’ve always been so independent and I have been the head of household for a long time. I love her to death, we’ve always been so close but this whole situation has me miserable.