Anastasia thinks that it is what is right.
She may have went overboard by telling Zen that he didn't need to do all of these - reviving her, taking care of her, and wanting to be with her, that is. He always has a delicate yet pure heart, after all. When he did or said something good, she knew that he meant well.
He did get fooled and manipulated before, but she thought that he was no longer that gullible in the present. In fact, he seems stronger now. Even then, she knew that not everything about him changed. He was still weak with emotions and other things that books could never explain to him.
"That's right. He was only feeling bad for me this whole time..." Anastasia thought sadly as she made her way back to her bedroom.
"He probably thinks that he owes me his life - that he is in a huge debt. Though I know he meant well when he did all those nice things for me, I'm not sure if I'm grateful."
She did not ask to live again.