There was actually a rather good editorial in The Observer a few days ago — and by "good" I mean one that well expressed sentiments similar to my own. *grin* Unfortunately, I can't seem to find it in their online archive, so I can 't send you off to read it, but here's the gist:
Valentine's Day should be about celebrating those who we love and those who love us. (For those of us called to it by our personal beliefs, it should even be a reminder to love those who do not necessarily love us.) Not love = sex, not love = romance, but rather love = that much harder to define and act on thing, caring about our fellow human being (whether they've earned it or not).
So, I say Happy Valentine's Day — and remember, someone loves you!