I would say he is mad about you.You did something that hurt him a lot.I would say you was his passion, his only love and i think this guy still have feelings for you and he is angry with you for this User:
My "ex-friend", is close to another chic who eventually became his friend. He gives her all the privileges in our group of friends. Whenever me or someone close to me want to do anything, he would ignore us. And when I would raise my hand to take on some responsibilities, he would just look at me with s blank stare, then look away. Yet he has known for me many year and at first we were polite with each other, and a little before he met her friend he became weird around me. But for the past 3 years, he always hides and stares at me. He seems apathetic and angry towards me when I am around.
I just want to know why he would want to watch me and intimidate me, if he does not care to be my friend or chat to me. He gets so sad-faced and closed up when i am laughing and talking. He hangs out with his clique that he has made for himself. Some of those people were my my friends, but they are drawing away suddenly and only hanging with him. I even think they are afraid of him. I know when you have an issue going on with someone, you should ask them about it or forget about it. But I cannot talk to him because he practically wont allow me near him and, secondly I am just curious as to why he's so mean, when everyone else treats me better. And when i try to participate in the group activities, he just looks at me, then look away to get others to participate.
Some people enjoy torturing others at their own expense. Maybe you should re-evaluate the situation and try to help your friend to see what is truly going on. (More)