You mentioned you're 22yo. I've got ten years on you... and I can tell you from experience (confirmed by the talk among my friends) that it only gets better!
The best sex you've ever had in your life... will compare to a night of "bad sex" once you hit your 30's
Now... here's the fix for the emotions that are bouncing all over the place, and the negative feelings you are going through right now: Get out with the girls and HAVE FUN. You may have to fake "having fun" at first - but I always say
fake it till you feel it! Go out, talk and laugh, be around people that genuinely care about you - ie, true FRIENDS. If you dont have any - make some! That's fun too. Trust me... I am not from the area I live in now and it wasnt easy - but well worth it.
Anyway, you might even want to tell them how wonderfully nice he is - that he was honest with you about not having any feelings for you, but still wants to have hot meaningless sex with you. They'll dog him out for it... and you'll feel better *laugh*
Dont resolve yourself to sitting home and drinking wine. Go out and have lunch, or even dinner - even if you go alone. Call an old friend from high school you havent talked to in years. Get on Yahoo Games and play a couple hands of Spades or get in on a Bingo Game. Whatever it takes to occupy your mind until your "old self" returns.
Best to you!!