it depends. for me, it's usually both, I'm single for v-day again ( none of the guys I've talked to particularly like my attitude or personality, they're all over the popular girls who have almost no personality.) but on the flip side, I've got a spa day planned with my sister.
I would guess it would be nice if you have a boyfriend, but otherwise, it'd be annoying. I wouldn't know, since I'm forever alone! Just kidding! Hopefully! But after a break-up or with a new boyfriend would be awkward!