What if I accept one prom date and someone better asks me?
If somebody new asks you to the prom and you already have a date, you should not upgrade because if you think you are doing something to get a better date, that is not an upgrade, that is a downgrade on your personality. Somebody has asked you out, you've already committed to it, you need to stick to it. At the end of the day, it's not about who you go with, it's about what you do, and your friends, and having a good time, and dancing the night away. So definitely do not accept the second offer. You have one, so stick with it and be happy.