Tells her he's busy, go home...

"Hey, Judy, I'm kinda busy. Why don't you come back another time, -okay?"
Her face twists with infuriation, "FINE!" She turns and walks out.
He knew he probably sounded like a jerk, -but who wants a hyper sixteen year old at a college party? He'd make it up to her later, maybe offer to buy her a new CD or lunch or something... (and apologize, of course). She'd get over it. He often thought of her as a little sister, but he hoped for a little more action than what a person would typically want a little-sister tagging along on.

Well, it was about thirty-five minutes till the party. What should he do now?