<human>: I was really close to this friend, Bob for a year and a half. We had a major falling out and it's incredibly awkward and uncomfortable whenever we bump into each other... which is pretty often because we share the same group of friends and reside in the same dorm. For instance, I got into a car accident and I asked a mutual friend of ours to drive me home so I wouldn't have to walk home by myself at midnight. Bob was in the car with this mutual friend at the time. It seriously would have taken only five minutes, but he was so against me riding in the same car as him that he called me a rude person for interrupting their plans and got out of the car when the mutual friend agreed to give me a ride home. 

I don't care to be friends with him at all, but I would like to stop feeling bad or bitter about it. I can't end things on a better a note because he refuses to acknowledge my presence and uses other people to talk to me for him. (He asked his girlfriend to text me to return a book to him) Not too mention I'm tired of constantly being the one who attempts to resolve this matter. So what can I do to stop caring about his existence?

Condense the text into a few key points
<bot>: Had a friendship that ended badly and would like tips on how to get over it so that I'm no longer bothered by the thought of him and our friendship