In any case, for me, what made that line particularly sad, was that it signaled the end not only of a particular relationship, but the end of the book, emotionally. Clearly very subjective, but yeah. SmartGirl333 is right to say that, because it was canon, it was always sort of a given, and i guess for this reason, it doesn't necessary encourage the same kind of enthusiasm or support as non-canning pairings. But precisely also because it was also sort of a given, to see it finally come to naught, was slightly crushing.