I say ignore the others. They don't understand. I was just like u at one point and understand what you are going through. So you like your straight best friend. You have some options since she's bicurious. Firstly, make her go on the computer and read like lesbian love and sex and stuff. If she doesn't like that then she might not be bi. But if she says something along the lines of I don't care what gender I just want love then you can ask her if she wants to try to find love with you. Ask her if she would give it a shot. If she says yes then great but if she says no then ask why. If she says she's afraid to lose you as a friend then nod your head and let it be. Don't risk your friendship if she's that awesome to you. If she says yes then be happy but don't go to fast. Bicurious people are actually more timid then normal people because society shuns bi lesbian or gay people because of their reasons. Take it all nice and easy, a brush of hair from the face here, a hug there. Try to keep it slow and enjoy your time with her as a person. If you rush into it she will back out and probably not talk to you for a few days or just act like nothing ever happened between yall. Don't be afraid of rejection, embrace it. It will make you q stronger person and even I'd it hurts, it eventually fades. If she is really willing she will give it a try, if she is scared of losing such a close friendship then don't push her, if she doesnt think you and her should try because she's scared, comfort her and still be close bffs. Trust me, I almost lost my bff when I asked her out. We are still sisters and have fun but it kinda hangs in the air. I hope this helps you and if you lose confidence in yourself read this again! From a thirteen year old girl who hopes everything goes wonderful for you.