Would the OP mind if it wasn't so much a goodbye as the DB mourning their partner? Think about it, an average elf lives to be hundreds of years old but the average man lives to about 100... I was thinking about using my DB, who married Farkas, and basically doing a story about him over a thousand years after his husband's death and how, every 80 years or so he goes and mourns. At the end of each mourning period he says goodbye to his husband for another 80 years as he locks away the feelings that he once had, now but a gentle pain, and leaves the grave.