WHAT SHOULD I DO?!?!??!?!?!?!?!

there's this boy, we're very close friends. He asked me to go with him to the halloween dance. I was planning on going with my bff so we could dare each other to dance with random people.I dont want to go with him because on the last song, my bff is going to "dare" me to dance with the boy who oh-so-happens to be my crush, I was really looking forward to that. Also, we r FRIENDS. I want to be friends with him, but not beyond that. But i still want to keep my friendship with him.What should i do?