I know it's a hard day for many. For me and DH, it's two weeks after our anniversary, and we always make a pact to ignore it - he tends to ignore the pact to ignore, so I decided I should do something this year - small and silly.
So, I bought a box of sugar free strawberry jello. I mixed it up and put it in a heart shaped pan (which we keep around as it's the perfect size for two chicken breasts). It was a pan, not a jello mold, and I don't know the ways of geletin, so I couldn't get it out, and served it in the pan. He was puzzled (we never eat dessert and jello isn't part of our repetorie). I said "this way you'll know my heart is in the right place", and he said "this way I'll know your heart is fake" (because of the fake sugar).
Oddly, he liked it a lot, and wouldn't let me throw out the left overs.