grr, sorry to hear your S is not coping well with the separation.

Moving back together would be a huge mistake.

Children need to see love from each parant. I have just started to read: Mom's House, Dad's House.
It may help you with your sitch.

Continue to show your S love. And let him know this has nothing to do with him.
Gr8

Bomb 8/09. Brief piecing 12/10. D-2/12
Two incredible kids D9,S6 Leading new life!
“Success is not to be pursued; it is to be attracted by the person we become."