A few additional observations about Valentines Day to brighten everybody's life:
First, in the original medieval documents about Saint Valentine, they didn't mention anything he did in life, just the gory details of his execution.
Second, our Valentine's day more likely originates from the Roman Lupercalia festival in which pubescent boys would dress up in goatskin thongs and run around their local village slapping middle-aged women with slabs of wet, greasy bacon. The women were then required to laugh in a kind of mirthless way whenever struck with the bacon.
So, as you can see, Valentine's Day has hardly changed at all since ancient times. We still have all the core elements: gore, suffering, inconvenience, adolescent sexual frustration and people forced to pretend to have a good time.
Of course, I've been single every Valentines Day for nine years...