8, it really sounds like a sticky situation to me alright. I had the same expeirence a few years back, my girlfriend at the time was a total party animal, and probably went out every night, not to mention she had alot of male friends. Me on the other hand, probably could count my true friends on one or two hands, and very rarely go out. But we made it work for awhile, then when we starting arguing alot, we split because we both wanted out.
Anyways, your girl seems alot like the one I was talking about in one sense, that she likes to party and hang out with other guys. It sounds to me like maybe she's playing you man. If you say maybe she engages in sexual relations with other guys, and she dosen't even kiss you, I'd stay away from that man. But I don't know the Whole story.