So, he's learning it's a fucking, cold, hard world out there without you in it to oil his wheels.
Girlfriend, you have been doing amazingly. You've not posted once about sobbing for England ( like I used to) you have sorted stuff, got on with your life...you haven't needed him...and he knows that.
I'm not saying don't have the tosspot back. That's your decision.
I am saying...give him a bit more hardship. It's only just starting to bite him in the bum. Now let him feel it.
Winters coming. Everything is much worse when the nights are bitter, days are shorter.
Being at his mothers won't be ideal. She's got your problems. Creeping round the house during the day so he can sleep. She's not going to want that for ever is she.
Sometimes the most powerful thing to do is to do nothing.
That's how I would treat him.
Cut off his oxygen supply.
If he rings...I'm not ready to talk to yet.
If he wants to meet up..I'm not ready to see you yet.
Let him See and feel his world...without you in it. Let him really grieve for what he once had and what he didn't protect and treasure.
You can do this and if others find out good. You can hold your head up...it's him who is the loser.