I lurk more than I post, I suppose it is because I think it is redundant offer my two cents when everyone else has, especially when threads like this give me a headache because they become more about the contemplation of the act of asking a girl out rather than sharing the outcome of the attempt.
I'm not going to give you any advice on asking the girl out, that has been done, I will say that if you do have a relationship together, there are more memorable experiences to look forward to than asking the girl out. Just as you'll have the chance to make awesome memories that will be more precious than the one you share of your first date or the agreement to partake in one.
But for the love of Pete, Sam, your sanity or God, just ask her out. And whatever happens or whatever your opinion is of my post, I challenge you to refrain from posting in this thread until you've asked the girl out!!!!!!