Legal action against cheating boyfriend

I am in relationship since 4yrs.. I am hindu and ma bf is converted christian.. We were in same college..he is cheating on me.. We were in physical relationship on a promise of marriage.. I have undergobe through abortion also on the basis of marriage.. Now he is denying me for marriage.. I have told his family all the things then also his family ignoring me and my calls to.. I have given a written application against him.. But in his family his uncle is PSI.. Pls suggest me what action i can take against him..??