As in "our hearts match" and "the perfect match". Could it be an idea for wedding favor if interpreted that way? (have to make sure no one accidentally light them inappropriately during the wedding though)
Melted crayon hearts: A boy in my class a couple years ago gave these as little Valentines made out of melted crayons. He said, "For Crayon Out Loud, Happy Valentine's Day". could also say, "You COLOR my world!" Use silicone cups to melt them in.
Heartwarming - A heart-shaped meadow, created by a farmer as a tribute to his late wife, can be seen from the air near Wickwar, South Gloucestershire. The point of the heart points towards Wotton Hill, where his wife was born. An amazing tribute!