you gotta have heart!
And they could be in any form; your butter pats could be in a heart shape, your cake can be heart shaped. The pizza bagels could be heart shaped, the croutons on the salad could be too (I like that one!) One of my more creative brides made placemats from rice paper so there was a big petal studded heart at each placesetting when her guests sat down. You could even add some markers to the table and encourage guests to write notes on their placemats, to be collected at the end of the night. How fun!