Busy yourself with other things and
you will get over this guy. Maybe
you are very lonely and that is why
you put
up with him in the first place. Work on this so that you are not in this situation. I'd not stay with someone for two seconds that made me feel like he didn't think I was good enough for him. You did. Why? Work on your self esteem as well. And don't let your ego be drawn back to him because it wants to prove subconsiously that you are good enough.