Im with my ex boyfriend. yea ex.?

well we broke up. he has a new chick. he still wants to talk to me. he still well says he has feelings for me. but then why is he with her? i fell in love with the dude. so i gave him my virginity on wednesday. i felt bad only the fact that h had a chick. but it happened and i dont regret it. well he is always faighting and arguing with her. okay so the chick hes dating righ now is his ex ex. they went out. then he & i went out. she made him choose between us she had told him that if he choosed me he would lose all of his friends and that he would have losteverything for a girl he bearly knew. so he choose her. i was depressed. i feel in love with him. i still do very much. he was talking to his chicks best friend and he asked her if it was true what she had told him and she said that no she wouldnt have stopped talking to him. then he said that he tought it was easier to just stay with her even though i was batter gf. his gf right now really likes him but they fight too much and hes getting tired of her. hes scared to brake up with her bcus hes scared she might kill herself. i asked him that i want to be with him aand he said he does too but if he does brake up with his chick he wants to stay single. wwhy? im so confused. so hes cheating on her with me. is he using me? everyone says he is. when we both are together we seem like the perfect cople but whats missing? sorry i wrote this too fast. i dont even know what im asking. =( ugh i really like him.