Asking to Prom(Etiquette, advice, and opinions)?

Well she should have just told the first guy she was already going with someone else! Haha. If you can't convince her to go, just ask someone else. It's not to late. I think you should probably ask within one week though so that she has time to get a dress and everything. And prom isn't as big a deal as the movies try to make it. So don't worry. Just go and have a great time with your date and your friends. you'll be fine.