[He doesn't know how to feel about that revelation. Tyki is gone, and that's a relief, certainly but the fact that he stayed means Spike was right, that what they did to him worked, that he chose to die alone in remorse and pain. He can't feel good about that. In the end the whole situation leaves a bad taste in his mouth. There wasn't ever going to be a good way to resolve it.]
I wish I could say I'm sorry and mean it, but I don't know that I can. I know you two were close.