What if she goes? What is she doesn't go? Will it make a difference in what you do or how you act? Have fun is what you do. Be happy, but not hyper-happy. Maybe give her a compliment, but don't cling to her.
your right, i will have fun regardless... normally i never danced, because i was always too worried what people would think... not anymore.. I can say something like " you look nice " eh?