Im a girl who has this crush on a really good mate and I think she likes me back, how can I be sure?

ok I know this will be really long winded but ill try to make it brief here goes. I made some new friends at coll and a few said they were bi which I have no problem with and we all became good friends. at the end of last year I started getting close to this one girl and resulted in us getting closer and her sitting on my lap, occasional holding my hands when on my lap and some light flirting about tieing up, etc. as the months have gone on we have become really close to the point where we are talking continuosly (texting, msn etc), for ever hugging each other or have our arms draped over one another and when ever I sit down she has to sit on my lap or near me. we had a weekend away with the girls and we all had abit to drink which ended up me waking up in the night with her grabbing my breast in the night and smiling in her sleep (i really didnt care at that point because I was wrecked and so was she) which also ended up us spooning several times over the weekend. when at coll we are now play fighting, we end up biting each other (mainly her biting me, yes I know you are probaby thinking why we do it and personally I have no idea is just a case of me and her find it funny), she sits between my legs and leans on me, either me or her being pinned down ont he floor by the other and sometimes she ends up pinning me to the floor and sitting on top off me on my waist whilst holding my hands down. when I have a laugh with some mates like running my fingers down there backs they flinch and jumps forward from it but with her she enjoys me doing it aswell as lightly tickling her neck and tickling the top of her leg. I dont want to wreck the friendship we have as she is an amazing person and I find her really intersting, any advice for me? oh and btw I am a straight girl but over the years I have thought of myself as bi-curious (i personaly wouldnt class myself as bi for the pure fact that I havent been with a girl) alhough I have never been with a boy or a girl. so as you can tell its a big thing for me but the thing is its not the first time it has happened to me and never actually had the guts to tell anyone how ive felt about them. so any advice is welcomed.:) x also any people that dont have any helpful advice and dont like it dont bother commenting thanks xx

It sounds like she just likes your attention...and it sounds like you like her attention too...but that's about it unless you feel differently, then let me know but that's what I think:P

Well, she's bi. That's quite helpful. Maybe you should just try to hint her what you feel. If you think she may reject you, you could do it without using much words. Joke around with her when you're alone, then get serious and look deeply in her eyes, draw your face nearer hers slowly. See how she will react. If you consider the reaction good, kiss her. Just an idea. Do what you think it would work best.

i think she loves u like u do , if u r interrested about her, go ahead and kiss her, she ll react on positive way, if u r not, keep ur friendship pure, and look for a boy to forget about her