YG
If he wants to sort this out then this is the shock he needs.
If it is beyond repair, it is in my opinion better to sever all ties as soon you have the strength, than hobble on indefinitely.
If you don't find the strength this time you will next time.
Look at Titania, Mr T is on the back foot, has agreed to counselling and is sleeping on the couch.
What I am trying to say is you will find the strength from somewhere.