My ILI ex was similar. He intellectualized emotional situations and human relations. He could be sweet and adorable on some occasions, but then become completely detached in a sec. When I showed emotions he started to assess if they are true or not -he saw emotional manipulation where absolutely none was present. He wasnt autistic or psythopath though, I'm sure of it, just shizoid (to some extent).
Strangely he cried histerically in front of me when we broke up, which is odd since he initiated it lol, and he said he didnt cry before since he was a child. Odd creature.