Mention the conversations and her anger. Mention that she really seems to be turning. Mention that she seems to indicate once in awhile that she wants you to initiate something more. But then seems to go back in her shell again. Ask if she's doing this because you may not have responded the way she wanted (going after her). I just don't know.
To this day, that whole book conversation REALLY gets to me. Tell Jody about it.