These sorts of topics always make me want to listen xD
Well, being a Christian I'm not soo happy about gays/lesbians. It's my belief, so so don't attack me for it ^.^
I know someone who is bi and they are very nice and funny =] I don't really think about it. They're older then me, so I don't 'hang' around them and I am not one of their best buds. We are on speaking terms xD
I suppose someone my age who is gay/lesbian that is in my class or something would make me more uncomfortable. I don't have that much agaisnt these people, I know it's just the way they are, so accept it, yadda yadda yadda, but the way I've been raised and think is that gays/lesbians are wrong. Please don't think I'm a bad person for saying that.
Anyway, was she a good friend before you 'found out'? If she was, there isn't much point not being her friend anymore. If she wasn't, then you should decide what to do.
Also, the touching bodies part is actually quite disgusting. If you are not over 16 or whatever, it's gross and wrong. (I'm putting my foot down here.) If you stay her friend, if she starts touching you or making you uncomfortable by saying things (such as she will touch you) then you should tell her no. IF she still doesn't stop, I suppose it is time to abandon her friendship. If you a straight now you shouldn't really get mixed into this stuff.
Which leads me to say...
DON'T BE INTIMADATED(spelling?) BY HER!!!
If you are scared about what she might do if you say 'no' to something (IF she does anything), then, seriously, say no!! You shouldn't buckle into pierpressure(spelling?) at a young age.
Good luck!
EDIT: I think my best friend is a lesbian (don't ask why) but I will not abandon her!