relationship help

Lovely
My SO and I have been fighting constantly since we got pregnant. Everyday day it's an argument over ANYTHING. I've become insecure and he's not making it any easier. Y hanging out with his biker friends until 4 or 5 in the morning. He has other children and his ex is super jealous of our relationship and is being spiteful with his kids and will not let them come over to our place. That has hurt him and caused many arguments between us. He said I don't understand and I tell him I do but it's not my fault he should take his anger out on me. We went days without talking. Just a lot of pain and hurt and anger. The day before Valentine's Day he came to me and told me he was getting his own place. He believes that we need space because of the constant fighting and he also needs a place where his other children can come and visit him. Of course I was devastated!!!! I'm 5 months pregnant !!! He told me we were not breaking up but just taking some time to have some space from each other. 🙄 Valentine's Day morning (the VERY NEXT DAY) he moved out. He already had an apartment waiting he secretly saved money and moved out. I'm heartbroken. Devastated . Miserable depressed. I can't eat i can't sleep I haven't been to work all I can do is cry . I have so much anger toward him. He has tried to contact me and come by my house because he "misses me" and I can't help but to be mean and nasty toward him or give him the cold shoulder. He says I'm being selfish and I say he's being selfish! He says he did it for his kids and I say wel what about OUR baby!!! I have children also who love him as a father figure as their dad died a few years ago. What about my children?
I'm so broken .