If you are unhappy, you will be unhappy today, Valentine's Day.
If you are happy, you will be happy today, Valentine's Day.
Valentine's Day has very little to do with it, except maybe reminding you that you are unhappy or happy. Of course, you are likely to find lots of things to remind you of your emotional state anyway. So quit your bitchin' about Valentine's Day.
And I say this as a person who is not particularly fond of the holiday. But I do realize that the holiday doesn't change me.