I guess I need to say the Office for a few more years before I get used to the fact that we don't actually celebrate St. Valentine's day in the current Roman (Catholic) calendar. It was a pleasant surprise, though, when I opened the Liturgy of the Hours on Saturday morning to be greeted by the memorial of Saints Cyril and Methodius, who were 9th century missionaries to the Slavic peoples. And you guessed, they created what would come to be known as the Cyrillic alphabet. Pretty cool, huh?
Of St. Valentine himself, we know basically nothing. Actually, there is more than one St. Valentine that we honor as an early martyr, but that's about all we know about their lives (which is enough, really). The various legends surrounding him are just that, and as far as I can make out, the correlation of St. Valentine with the lovey-dovey originates thanks to Chaucer who, using typical poetic license, noted St. Valentine's day's correspondence with certain birdly springtime activity.
I'm not saying we shouldn't celebrate it in the popular fashion of being extra sweet to our beloveds. I'm just pointing out that we have even more to celebrate (saints and martyrs) than just our feelings for each other.
In any case, I'm rapidly approaching my tenth anniversary, so Valentine's day is not such a big deal around here. This year, as it was two years ago, it was the official date of getting new phones. Two years ago, the wifey got a pink Razr, this year, a pink(-cased) iPhone. And flowers, of course. Can't get away without those, even after 10 years... :)