Please i have a problem with a guy please advice me!?

i met this guy six months ago.. and we started talking alot and he told me that he cares about me and want to stay be with me and so and so .. but after that someone told me that he is married!! and once i asked him he said that he was engaged but wasn't married because his paretns wanted him to marry that gurl and he left her .. but aftar a month my friend called and said that he is seeing her friend! and he told her that he wants to marry her and in the same time he was talking with me showing me how much he cares!! then i recognize that he was lying to me but the problem is i sent him a msg and told him that we are over and u lied to me and i want nothing from u just stay away so he replied and said "as u like.. and u know nth about me" !! well.. i miss him so much i feel desperate i don't know why although i know he is a liar i miss him so badly i don't know what to do i was mad because the days we were talking he call just for once or twice a week!! please tell me what to do :(