[sick of it]

Quick background. Im 23. ive had 1 girlfriend for 5.5 yrs. she was my first and only everything (relationship, kiss, sex...). she broke up with me 8 months ago, moved on rather quickly and it destroyed me. Ive been much better and spent this entire time facing the pain, dealing with it and trying to become me again.

now to the subject...

Last night i made dinner for a bunch of friends. they all know my situation and have been there for me. i got drunk off some wine and ended up hooking up with a very close friend of mine. nothing serious (nothing below the belt, i stopped it). though it was fun and it felt very good, i dont feel right about it. i feel like i did something wrong. i dont have feelings for this girl and i never thought i would ever do something like that (maybe i didnt...the wine did). but i have this overwhelming feeling of guilt like i cheated on someone.

can anyone give some insight?