And that's why I'd like to shake you from top to toe!
What can I say? I admire your strength and great heart and constant compassion, Sevgi, I can't help but admire that, knowingly in your situation, I wouldn't have been as patient as you are. I would have turned the world upside down. I wouldn't have taken it. I pray that Allah subhana we ta'ala will reward you for everything you've done, every little tear and sad day... For you definitely deserve it, hun.
But I know I might sound rebellious and bad and whatever, but what if you did try to make him live on his own? He has never lived without haunting you and how do you know he actually needs you? What he needs, is MUCH proffessional help and Allah's guidance. I mean seriously, you know I am right. You just find it hard to make this into a practical thing, I can sense that. You're so scared, it shows through miles and miles away.
You know why you can't help him Sevgi? Because you yourself are still broken. You are still hurt and weak, shaken inside. Although slowly you get stronger and stronger by the will of Allah subhana we ta'ala, you cannot help him. He isn't just like an little kid's nightmare which they have to face at night, he is a nightmare reality. A little kid fears the dark because it's unkown and its imagination is playing. You on the other hand, see reality in the eye, have to hear its voice and threats, have to put up with an person who has lost touch with this dunya and his mind. You can never help him, except for one only little thing. Dua. Nothing else, for the more you spend your time on him, the more you loose yourself.
This is just my opinion but Ihope you take it into consideration.