Difficult situation. Me and my SO have a 1 year old with another on the way. My issue is my SO is a…

Difficult situation. Me and my SO have a 1 year old with another on the way. My issue is my SO is a very negative person and quick to anger. At times he can be critical of me and say mean things. He overreacts a lot. I also can be mean in response but I am working on walking away when I'm mad. I'm 32 weeks pregnant, I don't want to argue with him anymore, I love him, but he refuses to work on his issues. I know I can't make him be anything different than he is, but I am resentful and angry. He won't see a counselor. I do on the other hand. I'm just mostly upset because his negative attitude towards life depresses me.