Yes, Nucking Futz hit it home, you only way out is through. We can help you through but we cannot help you avoid. It will keep coming at you until you face this. Knowing that you have a son, there's nothing more important than having him having the right support. But how about you, where is your support. In this case, I believe you should stay in the relationship and get him to change but if he refuses change them you can leave him, because the child is going to want to be with his real father. But if his father is not the man you should actually be with him, you and son deserve better