Actualy there is something worse than spending Valentine's Day alone; spending it with someone who doesn't care and never will.
After a marriage that ended badly in 1990, I raised my two sons (who will always be my sweethearts no matter how grown up they are) alone. I still get that alone feeling sometimes, but then I remember I don't have to answer to anyone either. After the abuse I suffered in a bad marriage, I can honestly say there are worse things than being alone on Valentine's Day or any other day. And now that they're grown, for the past 3 years my sons have given me roses on Valentine's Day. So I'm alone, but I know I'm loved.