[Esoteric]

Okay, here is my situation. I am a fifteen year old, closeted lesbian. I've come out to my parents as a bisexual, which is half lying, and they were accepting, but they are the only ones that know. I am probably going to begin dating a very nice guy in the next few days (he's deffinitly on the verge of asking me out, and I don't think I have it in me right now to turn him down). He's a good guy, very handsom and such, but I am just...not interested, even though it seems I should be. But I am much more interested in a friend of mine, who is a flirt, but always seems to direct her flirtyness more towards me than anyone. She claims she's straight, but we have had a few close encounters. No kissing, unfortunately, but with all that we have done, we might as well (no sex, either, just making that clear, just LOTS of cuddly stuff, and one incident where she climbed on top of me while i was laying down and she started to sorta.....uhh....anyway!).
I have no idea what to do. I dont know if she is what she says or if she's hiding something as well, and I have no idea how to deal with this.

Any advice would be very much appreciated. Please?