I always struggle to make lovey-dovey cards, and I have to stop myself sighing when someone asks for one! Anyway, this is the effort I ended up with. It's not quite right, I think if I'd put 'on your engagement' at the top instead of the bottom it would have been more balanced.
Image from Lili of the Valley - coloured with watercolour pencils. DP is some super oldie stuff from my stash. Paper Smooches single heart die. Not sure of make of row of hearts border die .... and I'd have to get up off the sofa to check ;)