I spent my whole saturday (not just the night) at a convention for game, anime and cosplay enthusiasts, called CosCon (was the first time it was arranged ever, held in Norway/Oslo (by the makers of DesuCon)). Had a proper brilliant day/night (it started at 3 in the afternoon, ended at 11 at night) with my friends (Can't remember any other times I've had so much fun before ^_^). Then afterwards I confessed to a female friend of mine and we decided that we're going to start dating to see if we're able to me more than just friends (take that, Friend-zone!).
BEST. DAY. EVER. ^__^