A bad turn

i don't know whats wrong with me.. i am so sad about it i feel so bad what i am doing. someone truly love me and someone doing use me. but problem is that i attract with the one who use me. he have to used me. at start he shows that is care of me but when i with him he totally  ignore me. i so much heart his behavior. what should i have to do??? i compel due to my feelings. i enable to control  my feelings. i really want to leave this person but problem is that he is so bad he used me after that he said he is only my friend.
 this thing so much hurt me. i want to give a strong answer with a high altitude if anybody read my post so please help me for this..