Seriously, do it.
There might comes the point where it will not be possible for you anymore to ask her out (i.e. she moves somewhere else, get's someone else as boyfriend) and you, beeing Anon, will eternally regret not asking her.
If she says yes: Congratulation! You are a WINRAR!
If she says no: Well, it was more then worth the try.
If she's cool she will still play games with you even after your confession if not she wasn't worth it from the beginning.