How do I get a prom date in three weeks?

I broke up with my ex in March. I was originially going with her. After we broke up, I was going to go with one of her friends, but I realize that most of her friends probably hate me. And, I don't know that many girls outside my ex's group. Shiiitt.How do I get a prom date in three weeks?
Do not go with one of her friends. That would create unnecessary drama in both of your lives, and the last thing she needs right now is that kind of additional heartbreak. It would put a strain on her friendship with the girl, and with you, and possibly you and the girl. Find someone that has no connections to her. You'll both be happier.