If you're going to be spending the night I would skip false lashes, as they are weird to guys and he might find it strange when you take them off before going to sleep, ya know? In fact - keep the whole thing simple so you don't have to spend 10 minutes scrubbing at your eyes to remove a lot of makeup. Then you won't miss out on the party or seem high maintenence by being in the bathroom for ages!

Good luck!!