"I don't care about the whole Slayer thing! I care about you, I care about us. If I let you go over to try to bring some humanity back to him you may not walk out of the place alive." But worse, well worse for him, there where things far worse that death. Lucius might not let Buffy leave at all and he could not go and get her. Granted he might be able to enlist the help of Emerson.
"Buffy, get it through your thick head. He did hurt you! He slapped you across the face and shoved you. If he can do that with out a second thought then he can do so much worse. Why can't you just accept that he is not that good guy anymore. He is evil now, everything you are sworn to protect others from." Alright, that was not good to say, because that would only enforce it in her mind to help Evie. "You can't save everyone. There will always be a more more evil person out there and one day you will not come back from the battle victorious, and where will I be?" his voice had been getting higher during his yelling, but as he got close to the end of his speech, his voice wavered. He could not lose her, not to this stupid prophecy.