So he's just not dealt with what happened. This must be so hard for you; but you don't need to be feeling paranoid.
My gorgeous man reads over my shoulder and though I don't particularly enjoy it and I've mentioned it once he makes a joke out of it ...puts his hand between his face and the puter when he talks to me lolll...or covers his eyes if I'm typing anything...makes me laugh, he's cute...but in your situation it sounds decidedly weird.
Pity he won't go to counselling it would make a big difference for him if he would let it. He needs to get back to basics and take a few deep breaths. But he may be sensitive to the puter because so many relationships start on facebook or through forums and chat rooms, and so many marriages are broken up because of it.
Give him a slap up the head and tell him I said wake up and behave