I have told him before and his answer is you are my wife! I need to be able to reach you! Keep your phone on at all times. What if I get hurt at work and they need you?!( he told me this while separated.)
It may be hard but tell him tough SH. t. When he chose to step out and separate what did he think it meant? He could go do as he pleases and have you be there to take care of him? It is his way of keeping you under control.
Like most others here you were fired from the W job. It is not your responsibility to take care of him if he gets hurt or needs you. He chose to walk away.
It is not easy, you need to get your boundaries in order and enforce them. He will test and push them like a mad man to see if you are bluffing. Don't back down from them.
You have come a long way. Keep going!
The person that you will spend the most time with in your life is yourself, so make yourself as interesting as possible.