Sweetie, it sounds like you have offered friendship, and he has chosen not to take you up on the offer--at least not for any sort of non-email contact.

I don't think pursuing him is going to do any good. I expect it will drive him further away.

There is some indication he is open to some email contact, but I would keep it strictly to email.

I can imagine how very awful it is to have no contact, but the only thing you can control is your response to the situation.

Me: 44
H: 44
Kids: 20, 16, 16, and 10
Together/Married: 22 years
H announced he was emotionally detached and considering D: 4/4/16
H announced he is going to try to stay and reconnect: 5/1/16