My boyfriend married another girl without knowing me as i was given a promise of marriage

I had a physical relation with a boy with an commitment of marriage. Besides this now he left me and married other girl without intimation.I tried my best to marry him by saying to his parents. They also started saying him to marry me. On his birthday he made me got his name tattoo on my body. It was very clear since the beginning that his parents given me a word of marriage ,but as time passed he grown more adamant and started create an threatening to commit myself suicide. If he don’t marry me, asked me to die. Force by such threat I continued the relationship hoping he will understand the situation some day and marry me. For me such step to marry a boy like him was dangerous. Also it is very difficult to stay for a life time.But i loved him truly with commitment. The same I communicated to his parents to explain him clearly and prevent him from doing such activities with me, but they didn’t seem taking it seriously.Previously he had a lot many physical relation with girls which i got to know lately.Now I am not in contact with him from one year as his parents given a promise informing that they will do marriage to us. He is not in contact with me. Now should i leave both of the newly married couple or should i put a case on him. I hope she doesnt know the matter of US. How to deal with such situation? How legally and morally I can settle the situation?