((( MissC )))
I think the difficult times in therapy cause intense feelings that linger a while sometimes even after working through them.
What you describe sound familiar to me. For me, I went into therapy idealizing T and am moving toward a more reality based relationship with her and while it feels really good, it also feels like I'm losing something and that makes me feel sad. Whoever said I wanted to come down to earth anyway?!
I also think that, for me, the lack of intense feelings and moods feel like an emptiness. I've often wondered if it feels that way to others, and I wonder what it feels like for those without BPD.

Sitting here with you, contemplating.