How to talk to this guy?!?! nobody answered the last one!?

so this guy and i have had a weird relationship (not dating relationship) but anyway my freshman year (we're juniors now) he liked me, but i didn't like him. then sophomore year he still liked me and i started liking him. but now, this year he likes this other girl.. :/ and i still like him. (PHEW. now that that's out of the way..) well this past saturday he and i went to a party and got really drunk and we hooked up. but i remember everything that went on that night, obviously so i think he might, too. and don't give me the spiel about underage drinking, i don't care. so i told him all this stuff about how i'm nervous to talk to him and i don't talk to him much anymore because of this girl he likes. so all that on top of it makes it a tad awkward. but i want to talk to him and i am determined to do so but i have no idea how because i'm incredibly shy and awkward. but also, i am nervous that if i do start talking to him again, he'll think its only because of what happened? is that even possible? haha i'm sorry i overthink so much. but please help me. i'll pay you! lol jk no i won't...so yeah thanks