>>3 is good advice.

Otherwise, just take it slow and rationalize. The best thing you could do right now is ask her out. If she says yes, great. If she says no, you work on getting over her. Do not deceive yourself into thinking that if you wait until just the right time, she will be more likely to say yes. If she likes you, she likes you. If she's repulsed by you, she's repulsed by you. Odds are this isn't going to change. You might as well ask her out, get it over with, and deal.