Do you know the Oliver Wendell Holmes quote "Love is the master key that opens the gates of happiness?" That's the inspiration behind this design. I wanted there to be meaning behind the symbol without it being overt, and to maintain the elegance of a classic invitation in a modern version.
And for the suite, I'd be tempted to line the envelopes in a pattern that looks a bit like the inside cover of an old novel, a la Persuasion, perhaps? [the one shown is from Paper Source] I'd also put the quote on the reply card and/or program.
[Voting continues for this challenge! My designs can be found here, here and here; and check out the other talent there as well! Inspiration images sources clockwise from top left to right: martha; martha; the red balloon via ohdeedoh; snippet & ink; 100 layer cake; martha; style me pretty; snippet & ink; martha; martha]