how do I handle a guy who has insulted me and is acting weird?

[awaken one]

there is a guy I know and I have chosen to ignore him and keep my distance. the first time I began to distance myself was because I was uncomfortable the amount of attention he was giving me because he had a girlfriend, the second time I pulled away was because I was going through some personal things and he made me uncomfortable because he was staring at me when he was around, the third and final time I pulled away was because he insulted me not once but twice when I told him of my past history of abuse in which he replied I was no good and it would affect me for the rest of my life. Not only that but when I tried to talk to him when I was going through some personal stuff I notice that he was intentionally ignoring me. . it was then I realised that he took what I was doing as a personal thing against him which made me frustrated.

So now when i see him I notice that he deliberately doing things to banish himself from me. I don't know if he feels guilty for what he said I just know that whenever I see him he is not happy and he goes out of his way to sit far away from me or in my opinion hides. I have made my decision to not let him near me because I refuse to give him the chance to say anything else to hurt me. So my question is . . .what the hell is wrong with him! and what can i do to insure that what the hell is wrong with him doesn't effect me anymore and is he going to leave me alone because he is attempting to speak to me after being insulting about my past. please be respectful with your answers because this is a sensitive subject. thanks