Mental disturbance. Obsessed for him?

Hi I don't know what problem I m going through.I m suffering from a disease I m want to get rid of but I m not able to do so.I love a guy with whom I m in relation from 4 years but after 2 months of relation he told me that he likes some other girl.I turned mad after hearing that and anyhow I consoled him to be with me.After that things started turning worst I lied to him which was immatriel according to me that time.we started fighting everyday I started saying him culprit for making my life hell for that girl and he never loved me.I had feeling for him from time I started talking to him but I never let him feel it ,we became very good friends,we shared all secrets of each other,I was happy that as a my prcious friend he is always with me,so I never told my feelings to him but I always gets jealous whenever he used to be some other girl but I never expressed it because it could damage my friendship.I could not complete my words due limit. Do I have become obsessed for him ?