Help! I don't know what to wear!!!?

Well, of course you should wear a bathing suit but make sure it's one that can easily transition from swimming to tanning to walking to dancing etc... A sarong, perhaps too, for when your walking around and talking. Bring a cute, casual sundress to change into for dancing later. Or a pair of shorts and a cute top (tee, halter, babydoll, whatever you prefer for your date!) And if you're worried about it being cool out, bring a cute hoodie along. Or, better yet, ask your date to hold you b/cs you "forgot" to bring a jacket! Good luck at the party!