Thanks Ahoy. I don't think he has anything up his sleeve (everything is signed and sealed).
Right after BD, I read all kinds of stuff about the "affair bubble" and maybe his behavior is just a reflection of that - he's just withdrawn as much as humanly possible into another world.
I'm amazed that I'm not more jaded at this point. I felt a little sick to my stomach when I realized he must have had a landline all along.