It's typical for WAW's to resent the LBS when they start DBing and end up in better shape than them. Afterall he was running away from you.
He thought the grass was greener on the other side and now feels worthless, jealous, and angry, because the grass on your side got greener as soon as he left.
He may be reluctant to return because he's not sure your changes are permanent. Give him time to sort himself out. Right now only he can pull himself out of the pit he dug for himself.
He needs time to properly sort it out. You need a partner who is mature and ready to do his part as a parent and a partner. This will take a while, feel free to vent and post, just don't expect things to change quickly.
