it's not just valentines day though I have never had a valentines card in my life.
I only care if my significant other cares, I don’t have one atm, so it won’t bother me.
If you have to rely on someone else to make you happy would you ever be happy. If you are know how to keep your self amused to share companionship you in turn should not rely on another person to give you happiness. Not to exclude that another person can make you happy. Just to point out that to share happiness is not to rely on someone to provide happiness.