ok...now maybe you'll finally listen to all of us that tried to warn you about this...and stay away from her. I understand why it's getting to you (she meant a lot to you just as a friend not even as a gf....) and what is up with YOUR friends makin out with her. Doesnt say much for your friends either.
Just be careful, and if she needs a friend be there for her. Trust me she's gonna need a good friend when she realizes what she's doing to herself (ie getting an STD, pregnant, whatever)