unlikely way: hire a mariachi band, invite him or her to dinner, bring a wrapped box small enough to be a ring, and as your ordering dessert pull out your guitar and sing the song you spent on the night before, somewhere along the lines of 'leaving, going, goodbye metaphors' with the timed band echoing your hints. Give he or she the gift and say you're going to the bathroom as they open the box there is a note that's says I'm breaking up with you