If flowers and confections aren't your thing, here are some Valentines that may pique your interest.
NASA marked February 14th by featuring an image of a "celestial Valentine" on its website.
The infrared image is of a star-forming region that resembles a heart.
It's called W5, and it's an area of space that contains countless stars in different stages of life, some 6,500 light-years away in the constellation Cassiopeia.
A little closer to home, Commander Chris Hadfield has been posting stunning photos (and cheesy poems) to Twitter under the hashtag #ValentineFromSpace.
"Seven billion hearts, but I can see only one," he tweeted, along with a picture of a heart-shaped water and rock formation.
Hadfield's 366,860 followers got in on the action, posting their own space-themed Valentines -- showing there's definitely something in the air -- and in outer space -- today.