The Valentine's Day before, I told everyone that, in lieu of actually talking to a girl and asking her out, I'd just buy a cake from Kroger and spend the entire day eating the cake. I couldn't legally buy alcohol at this point, so an entire cake seemed like a good enough vice (and a good enough personal challenge) for the day. I never bought the cake. I just stayed home and browsed the Internet.
I don't remember any other Valentine's Days before that. If I had to guess, I probably just masturbated and called it a day.