i don’t know what to do

i want to leave my boyfriend, the father of my child, he treats me awful and i can’t even say my opinion without him getting mad. i was trying to clean my car out today so i guess that means i’m trying to sneak off and cheat on him? and also if me and my sister stare at each other that means we’re talking in code and supposedly have secret plans. earlier he was apologizing and rubbing my back and he stopped and i asked him to get doing it and he screamed that he is not going to and that i ask every 3 seconds. he thinks he is always right and i’m always wrong no matter what and the things he says is insane. idk what to do i know he would try she take my son away from me ever i couldn’t let that happen he would have to stay with his dad in a tiny 3 bedroom apt with 3 cats a dog and a chinchilla and it smells awful and his dad abuses drugs and his brother and sister stay there and it’s so crowded. he wouldn’t even have a car bc he had no job cause he is technically disabled.