I've discovered, recently and personally, one of the best ways to get over the "i'm alone on valentines day" blues is this(by the way this most likely only works if you're female. sorry guys
Don't have somewhere to go dancing? Go buy something new, bold and rocking anyways and make an event out of being single. Heck, wolf down a chocolate cake or a tub of ice cream or something whilst watching a movie in your pj's. Do whatever it takes man.
Whatever. It. Takes.