Nah man if you just walk up to him & knock the shit out him it'll look like you care too much.
So what you do is, take the piss out him in front of his friends, shove him around (acting like your kidding), and other shit & basically goad him into challenging you, at which point you beat fuck out him and everyone thinks he's a complete dick for taking shit too seriously and a punk for getting beat down so severely. (Don't stop until he's at least bleeding)
Most parties are overrated.....
Hurts, I for one recognize your position as master party planner
Oh, and Cown if you need any more motivation, in addition to the hate you have already stored, just imagine if he called you Clown....