I need to have a think about this one. But you need to cut back on the Alinalysis! (I haven't used that in a while, and I felt the urge!)
I think that as the core, it isn't about her, it is about him, and only him. It might be that in his depressed state, the way that he felt with her seemed better to him. He might not have had to cover as much, as she was a step down. He might have been tired of hiding from you, or maybe he knew that you would eventually see through him. Whereas she probably won't? But that doesn't mean that it is about her, it was about him doing whatever he could to make himself feel better, without a lot (ok, any) concern for what hurt he might cause anyone else.
Anyway, I think it really isn't about her. If it wasn't her, it probably would have been someone else, in his state. To quote our friend Woog...... "He's broken."
