Can husband file for divorce based on affair prior to marriage?

I m 26 yr old female. I was married in 4 Dec 2015. Everything was ok in the start by after 3 months his mother started insulting me she used to pushed me. They don't let go out and they don't let me go my parents house also. I have to do all the work in the house and she used to taunts me in every single minute. Things was getting worse . I spoke to my husband bt he didn't respond. In March i requested him that I wanna meet my parents please let me go for one after few days he said ok n I came to my home and after he never come to take back whenever I used to call him he told that My parents don't want you to come. My husband and his family humiliated me. I was having an affair before marriage and husband also knows about that and now he is blackmailing about that. Now he is telling everyone that I was having an affair after marriage. I wanted to know if he files for the divorce against this . Dis he get the divorce. And is there any law that can save me from this.