I'm pregnant and my son is involved.
I don't want to leave him when he needs me the most.
Looks like you have your priorities upside down. Your son and the baby you are expecting need you the most. He is an adult and can get his own **** together. It's only one step from verbal abuse to physical abuse: what would you do if he flipped out and pushed you or kicked you in the belly while drunk? Do you think witnessing a drunk calling his mom a Ho' is a good example for your son and that this man is a good role model? Do you want your son to grow up thinking it is ok to call his gf/wife all kind of nasty names?
Think: If I was the one posting that I am pregnant and that the drunken father is abusing me and that my son is involved, what advise would you give me?
Hopefully you would tell me this is not acceptable, well apply the same standards to yourself. Set your priorities straight and be kind to yourself.