This may be the finest example of a heart-shaped formation on any planet! It's actually not a crater, but a collapsed pit. It formed inside a long trough called a graben, features that themselves form along fault lines.

This unnamed pit is about 2.3 km (1.4 miles) across at its widest point, and the image was captured by the Mars Orbiter Camera onboard Mars Global Surveyor. The pit appears to have quite a bit of sand and other windblown loose debris on its floor.

If you look at the top left lobe, you can see a meandering darker streak with a boulder at the left end; it looks like the rock must have rolled across the slope there, leaving that trail behind. If this is some kind of metaphor to a wandering path to love there, I leave it to you to find it.

Higher-res version.
Original release.

Image credit: Malin Space Science Systems/NASA