My friend is having a party, but the girl I hate is going. Help?

So one of my close friends, Payton, is having a sleepover for her birthday with five girls. Carrie, Arielle, Parker, me, and a girl I can't stand; Nicole. She always harrasses me, and seriously bullies me. It's not that I just don't really like her, her mission is to make me feel bad. And she told me that. So, we're kind of enemies. Anyway, Payton is having her at the sleepover, and I want to go because Payton, Carrie, Arielle, Parker and I are all really good friends. But, I don't want to go because I won't be able to have any fun if Nicole is there. It's a sleepover too, and last time I went for Payton and it was pretty much a disaster. I talked to Payton about it, but she said that Nicole would be really mad if she didn't invite her. I don't really want to miss it because all my friends are going. But, the last sleepover I went to that Nicole went to, was horrible. She's bullied me since second grade. Help, please. I want to go for Payton, but I really don't think I can do it if Nicole is there.