What I'm going to suggest here will be abit more work for you, this approach is forward, and I would wager semi-afc. So, instead of straight asking her... what you could do is get together with her and bring her into a place where the two of you are alone and not to be bothered... you could make sure that the location is romantic (candles, clean, etc), and just bring her there while you guys are talking.
Just let her know that you think that she is very special to you, and that you would like to share a great intimacy with her that you've never shared with anyone else because you wer waiting for that person that you know that you wouldn't regret being with...
Also, give her a massage, a full body massage... for like ten minutes, before you go in and start kissing her from head to toe... just keep progressing... then back away briefly, go back to the massage, then keep going, if she tells you to slow down then back away a little bit and continue. If she says NO, then slow down again, keep making out with her, but NO sex.
Your approach isn't one that's doomed to failure, but it is less likely to succeed then something along the lines of what I'm suggesting... I would also recommend doing a search on the subject, in the DJ BIBLE, because others have made a much more thorough post on the subject.
Good luck.
PS. I'll be sending you that info tonight.