I was just cruising around the boards and decided to drop in on your thread.
I have an autistic son (Aspergers is on the autism spectrum). I wouldn't put any weight behind someone speculating that your X has Aspergers. Believe me, Aspergers is more than just being a little aloof. It is debilitating.
If I understand your posts correctly, you were a WAS, and things kinda flipped into you feeling more like the LBS. You feel that he still loves you, and you feel the same.
Sounds like a pretty tough place to be.
Here's a another link that you may find helpful. I'm sure you can relate to them from the perspective of the WAS, and now the LBS. Maybe it'll give you some insight as to why you pulled away from hour X and why your X behaves the way he does.