confused about what to do...

okay...so i'm friends with this guy and hes really nice to me and people tell me he likes me and i like him and stuff but he has a girlfriend. sometimes he looks at me like im worth everything and ive never really felt that way...(not trying to sound soppy here)...but last night we were both at a friends house cause she had a massive sleepover and a was sat in front of his chair and in the end a sat on his knee and kinda just...slomped out and i ended up falling asleep and so did he and when we both woke up it just felt....right. i just want to know what i should do really and see what you guys think... do i wait until hes broken up with his girlfriend? do i try and forget about it completely? or do i carry on like things are and just hope some day...somethingll happen...as in going out or getting over him? he hasnt got a good history with girlfriends and i just dont wanna end up losing what we have.
thanks for reading this...
xxx

um.....anyone? :S

is he serious about his girlfriend? how long have they been together? if it really means that much to you and you beleive that he should be with you and not his current gf go 4 it! just try not 2 get hurt...i no dats crap advice sum1 help me out here! xxx

they were on a while ago and she vroke up with him and then they got together again about a week ago.