You have done a hell of a lot for your ex and he has caused you pain, heartache and depression, which you have had to seek help for.
We know they are not the loving person they used to be and would love them to return, say it’s been a big mistake, they miss us, they love us and have given up the cocaine for good.
We live in hope, but like you say he has to do it quick before its too late. You deserve respect and you are not receiving it.
Look after yourself physically and mentally because if he does return it will be to a better, stronger you.