Cute for couples although you should be showing your love for that person everyday.
It's kinda sad and lonely for (us) single people. Other people are celebrating what you don't have.
Some people just say it's for love (family love, friends etc) which is ******** because we all know it's for couples

I've only been in a relationship once during Valentines Day and it was lovely for me. All my friends kinda did a Secret Valentine (like Secret Santa) and it was cute - but I still think it's a corny day.