1) Get his cell phone # and call to tell him your ex-boyfriend just died and ask if he can come over and that you just don't think you can make it though the night without comfort. Text him a few XOXO's and happy faces.
2) Lay down in the middle of a busy street and pretend to have fainted (guys are suckers for this!)
3) Piick out a hot guy and accidentally rear-end his new car. When exchanging information...cry a lot and mention how you were just recently stood up at the alter and don't know how you're going to survive Valentines day, now that this accident happened too and you had two tickets to the movies and nobody to go with. (that might do the trick!)
4) Dangle your shoe and show some cleavage while looking like you've been crying. When someone comes to help, refuse to tell him why you're crying. Have a girlfriend work as an accomplice and let the guy know that you just caught your boyfriend with another woman and you just told him the Valentine plans are off!
5) For a particularly hopeless case....write back for advice.