I have formed a conspiracy theory about this day. It's not to celebrate love, but make lonely people feel even worse - which results in a lot of chocolate and ice cream-buying (everyone's comfort eating).
So, no.
My family owns a flower and gift shop, so we strongly benefit from this "holiday"
Personally, I only acknowledge it is because everyone else does. If I didn't get anything for my gf, she would never let it go.
...I'm going with my girls to dinner & a movie 