Celebrate in the expensive wine-and-dinery that is Valentine's Day with pink, sparkly hearts, roses, and chocolates (Another point for you, Hallmark). If you're single, treat yourself. There's no reason only couples can participate.
Still, my favorite Valentine's Day messages are those delivered by dwarfs wearing golden wings and carrying harps.
His eyes are as green as a fresh pickled toad,
His hair is as dark as a blackboard.
I wish he was mine, he's really divine,
The hero who conquered the Dark Lord.
So, wear your lurid pink robes, obtain yourself a Love Potion (just not from Professor Snape), and enjoy the excuse to indulge in chocolates from your "secret admirer".
(song from Harry Potter and the Chamber of Secrets, p 238)