NNNOOOOOOO!!!!!!!!!
OK? NO!
OMG!
NO!
Why? Because either one of three could happen:
1) you ask her out, she is not physically attracted to you, and then you feel hurt and embarrassed, and end up avoiding each other, thus ruining a great friendship
2) you ask her out, she says yes, you are in love for a while, then it doesn't work out, and it's akward, and you avoid each other, thus ruining what once was a great friendship
3) you ask her out, you guys fall in love, live happily ever after amen
look, i don't know....if i were you, i wouldn't...but what do i now? do whatever feels right