Looks like almost the entire Second Option Brigade is 'fessing up, so... me, too. In fact, neither myself nor my partner really celebrate birthdays, anniversaries, Christmas (unless we're haplessly surrounded by family),
or Valentine's Day - we tend to "celebrate" whatever day we happen to be in. We
do have our twenty-third anniversary coming up this summer, though, and we
might do something for that - we like the number twenty-three.
Several years ago, we visited Christchurch in Dublin on Valentine's Day. They have the heart of St. Valentine in an iron, heart-shaped reliquary chained to a wall in a chapel there.
That was romantic.