R u sure that it was 'cause he was bein' in character? Think back, did u do or say anythin' that he could've misinterpreted as offensive? It may have not even happened durin' the party, maybe it happened the day 'fore or earlier in the week? It may even b the fact that u dressed up like a maid when he lent his maid outfit ta another girl, maybe he had taken offense ta that somehow? Regardless of the reason, if he's a real friend; he'll explain and forgive u, but u haveta b willin' ta approach him 'bout it. It's the only way that u'll b able ta find out.