This guy accused me of being obsessed.?

i have been this guy's best friend for 4 years now and everything has been going great until recently when we finished high school. he was kind of a jerk in the past and yes i do like him more than a friend and he knows it (he shut me down but we're still friends :/ ) i got attached to him on grad night, didn't sleep with him or anything, but kissed and i embarrassed myself in front of him so many times during the night. anyways...we had a few spats after grad night and after that i tried to talk to him over facebook and he ignored me. i always knew he was a jerk and used and abused me constantly so i totally wrote him a huge paragraph saying i was really upset at him and he was being an ignorant jerk pretty much. he emailed me back later saying that he was at work and was pissed that i had no self control, was obsessed and he doesn't want to talk to me again. i felt so bad and embarrassed (again) he was my best friend and now i don't know what to do please help :( i didn't mean to cause what i did.