Even back in my High School days (twenty plus years ago), I found it more exasperating than anything. Every year on Valentine's Day, our school would hand out pink paper hearts to all the girls to wear. If a boy got them to talk, they had to give the boy their heart.
I found it annoying, because I had to repeatedly tell girls that I didn't care about "winning" their hearts, because their not talking was getting in the way of accomplishing stuff in class when I was partnered with them. Not only that, but listening to the guys talking about how many hearts they won often made me wonder how women were to win respect when such events encouraged men to see Love as a competition- with the man who has the most hearts the winner. I found it a little distasteful, to be honest.
Though I'm sure my attitude probably frustrated- and possibly bothered the girls due to the fact that I displayed no interest in pursuing them on that day... after all, many of them were bragging about how many guys were trying to get their hearts. As if that was a gauge to measure their popularity. That was something else that bothered me about Valentine's Day back then, since (as my best friend can attest) I really didn't give much thought to being popular, and didn't really seek it out.
This annual High School event probably helped to contribute to my dislike of "relationship games" that people play... but that's another discussion.
But that's not the only reason I'm not a huge fan of the day. I've been dumped on Valentine's Day (via answering machine), wound up having arguments with girlfriends, and even been cheated on during Valentine's Day.
All good reasons, I think- though the main reason is something much more fundamental: I don't need a "special day" to remind me to tell someone I love that I love them, or to do something special for them. It's something I try to do every day, because I don't love them on just one day- but every day... so, I don't see the point of it.
And to be honest, I can also see why single people don't like the day. For some reason, Society seems to think being single is a "bad" thing- a lonely thing- and that single people on Valentine's Day should be pitied because they don't have someone to share the day with. Being single is NOT a bad thing. I've been single for several years now (at least six years), and have been quite content.
Would I like to have someone in my Life to share today with? Sure. Do I need someone in my Life? No, I don't. I'm single on Valentine's Day, and happy.