Help me finally leave!

I love this man he’s the father of my child but he’s horrible towards me gets drunk calls me all the names in the book is screaming in my face. I’m not saying I’m perfect we had a huge fight last night to the point of I needed to call my sister to come get my son. We both took it to far. (Not physically) more mentally and emotionally. I want to leave be done. We just got an apartment together even tho we have been together for 3 years. I can’t see myself spending the rest of my life with that kind of negativity. But there’s something in me telling me that I can fix him and it will work! How do I stop myself from thinking like that??? I don’t want to get back with him but I’m worried he will sweet talk me into it..