I am 28f and in relationship with a 29m. I need genuine advice

128F is in a relationship with a guy 29M. We have been in relationship for 4 years now. When we first start dating he was this sweet and caring boy. After few months i got to know he is married when i asked him he said it was just for immigration purposes and he is going to divorce her but later i found out it was a love marriage. She lives in another country. Whenever i asked him about it he always threatened me that he will tell my parents about this relationship and my past relationships. He said he didn't told me anything about his marriage because I didn't told him about my past relationships. I stayed with him only because of his threats. He physically abuse me too on regular basis and don't even get me started on emotional abuse. He says that he hit me because he is mad at me because I didn't told him about my relationships or the guys i have been with. Recently i found that he is talking to other girls. He goes to meet them and do all other things. When I confronted him he hit me that I don't have any right to ask him anything. Whenever i try to leave him he threatens me that he will tell everything to my parents. My parents are very strict. They can't find anything about my relationships. I come from a community where parents decide everything and their family honour is everything for them. So they can't know anything. I really need advice on what to do?