Husband does not want to have physical relation what can be done

It's been 4 years of my marriage, I have a 1.5 year old kid. since the day of my marriage my husband was not interested in having a physical relation, I was the one who intiated it as i thought he was shy in that matter but as the days went by he was not able to do anything i realized their was some problem so i tried to discuss it with him many times but he would not listen or react and started abusing me and has hit me for the same reason twice as i did not want to break my marriage i continued being with him as he was fine in other aspects of life, later we had a child also but now again he has started being away from me and when i try to convince him he fights very badly abuses me in front of his parents and has hit me again.he says he does not want to have any relation with me and always says me to leave him, i have no job, my kid is just so small i don't know what to do now. he knows his parents will get him out of legal case as they have money.