love of my life

i fell in love with my best friend. i don’t know why or how because i know how much of a jerk he can be, i experience it first hand all the time. i told him, even though i knew he didn’t love me the way i loved him, i felt he should know. he gave me the bad, yet expected news, and i was numb. just because you’re expecting to get shot doesn’t make it any less deadly. recently he’s been acting different towards me. he hasn’t been looking at me in my eyes when i talk, (which he usually does) he’s always making fun of me and exposing things i’ve said to him that i wanted no one else to know. i asked him about it and he denied the behavior. then a couple days later he was still acting the same but when i asked if he was okay, it’s like he balled up every fight we’ve ever had into what he said and the words he used hurt me. i’ve been avoiding him since but this weekend there’s a party that we’ll both be at. i promised my friend who’s throwing it that i’d be there. what do i do?