I'm single, but not unhappy or bitter. I usually treat Valentine's day like I treat Yom Kippur. I'm aware of it but it's not MY holiday, so it passes unremarkably.
I actually had plans to go out as a foursome. Two of the girls in our group have recently had shit luck with boyfriends, so we were going to take them out to a nice dinner, but one of them got called in to work, so that fell through.