How can I handle my ex lover who got married

When I was studying 11 th STD I fell in love with a Brahmin... He didn't accepted my love so I attempted suicide after that he told he was in love with another girl but I wasn't able to leave him I asked him to live with me for just one day.. we had sex after that 6 months he was engaged to some other girl (not the girl he loved). I begged him plz don't leave me because we had sex with each other mine is a true love ,he simply avoided me and married to that girl.After that I fell in love with another guy, because I can't overcame the past ,easily I fell in the sweet words of that guy.. but it didn't long last due to family circumstances and the guy is not good also he loved me for money and physical appearance.. we got break up... This happened when I was studying 1 St year college.. in the 2nd year the guy I loved in school days called me and asked me to marry him... Because he was addicted to drinks and the girl who married him leave him.. In that gap he used me for 1 year ... After his problems are solved and when his wife came back again he leave me.. after that I forgive and forget all those negative things and lived my life happily... From past 2 months he was again torturing me that he didn't like that girl he wants to give divorce to her so for that he wants me to have sex with him and had a baby so that he can easily divorce her.. But that was not his intention he love her very much but at the same time he wants me just for sex .. I understand his motive and avoided him but he is torturing me daily and blackmailing me that if I didn't talk to him he will spoil my name as prostitute.. please help me what can I do to escape from him permanently..