it's just her coping mechanisms that make her think of all the negative qualities about you and the relationship. This is so she preserves herself and doesn't have to deal with the pain of losing you.
Hopeful. Sorry to hear about this difficult experience. This point by SoMadSoSad is spot on. They have highly developed coping mechanisms for pain. Try not to read much into what she is or isn't doing. There is no real link to reality.
We can support and encourage you, but there really is no real substitute for seeing a qualified professional face to face. Can you see a therapist or counsellor to talk this through?
Where do you think you are in the detachment process?