I am sooo confused............. help? (bi? bi-curious? straight?)(friends?friends with benifits?play toy?)

Alright, so I am 15 and Ive dated multiple guys and always thought of myself as straight. Ive had those OMG! I wish i had her.... _______ (fill in blank) smile, hair...etc.....

A few times I was like shes pretty or really nice, but I never had a crush on a girl when I was younger. I love the scent of a boys cologne or their touch and I have messed around with my fair share of guys for my age. But I am now wondering if Im really 100% straight. Ive fooled around with 3 girls, when we were drinking by kissing and touching eachothers waists and faces while on guys laps or infront of them. 

I partied a bit in the summer and stuff so I had those experiences... but I always thought it was something we were just doing to mess with the boys.

Ive never had a crush on a girl.. until maybe now. I know I havent had that much time to think about it as Im still young, but Im wondering if im bi or not.... I mean its really weird. So heres the story:

My friends and I were talking about how one girl that was really touchy, not like feelings touchy, but she huged us all the time, and stroked your hand or hair often. Which is normal, but she did it a LOT. I also had heard from my friend that she had been told by her a few years ago that she liked her. Later, i asked her if she was straight, bi, gay etc.... She said she was bi. 

I dont know where that puts us. We arent really close or anything, but I have really deep conversations with her.But I dont know if we are really friends or just really know eachother really well. I have had this urge to become her friend. The thing is I think about her really often and I always want to see her and get to know her more. I sort of want to touch her, not how i would want to feel a boy wrapped around me, but just softly. I want to pet her hair or something like that. 

Ive done really random things with her, like ive given her a massage while she was lying down, and I was straddling her. She asked me to go lower like to her but, and I sort of did but it was awkward for me. 

I dont know I just really admire her, and want to get to know her better, and yet Ive never felt this way with any other girl. I dont have a fantasy of me being with her, or having sex with her... Infact I cant imagine it at all.... I just want to be close to her, and to make her happy.

I told her that I was straight, and she told me that she was bi... so i dont know how that would be. Either way, I dont even know if she likes me, I mean shes really friendly to me, and we have done random awkward things... we talk every couple nites, by texting... but i dont know if were just two people who talk a lot to eachother, friends, or she could be potentialy interested in me. Or even if im interested in her that way. She said she just knew she was bi.... but I dont know at all... I havent talked to her about how i feel, and im not sure if i should. I noticed she has has only liked blondes in the past, atleast all the people she told me she liked were blonde. I dont fit that catagory... so I really dont know if she likes me at all...

If she liked me I would probably talk to her about how im currently confused, but at the same time... If she doesnt like me that would probably make life even more awkward around her. 

How  can i tell if she likes me or even sees me as a prospect... Also how can i know if i like her, or i just really like her in a straight girl way?

Ive never had a crush on a girl, but i sort of wonder if i do now. I had these feelings for her before she told me she was bi. But then I just ignored the, but ever since she told me Im begining to wonder if I am too, and what i should do.