I'm not so sure. I rather imagine she feels just like the actor for the HP movies do by now - you think of yourself as an actor, and not as an Harry Potter impersonator, and from some point on, you just have to say "That's it, no more, that story is ended." Or you will end up doing nothing else for the rest of your life.
I think we'll be thinking she has to kill him until, at the end of the book, there's finally a way out. I somehow believe during the book, he will come to the conclusion that he is the last surviving horcrux, and has to die, and then... tadaaa! Whatever.