How do I get over this? My boyfriend of two years was a complete jerk...?

Just let it go. Start over. Trust me its a good thing to do and if it happens again then don't go back. He probably was stressed out since he had to do all that stuff in a week. You also dont have to be super close to someone to be sad. Its called Sympathy for his mom or dad who ever side the uncle came from. Lets say your Friends Dog died you met that dog like once here and there but you were not attached to it like she was but you still feel sad right?