Like Mefnord, the idea of Buffy being with someone else never bothered me, but I really didn't care for the Immortal idea or the way it was done. They're all moving on but...only not? It just seemed like a way to slap a band-aid on an old plotline without having to actually deal with it, which is dumb because they wouldn't really have to if they didn't bring it up in the first place.