Hi Anarette,
For a situation such as this, you need help too. This is an awful lot for one person to take on, and it is having an affect on you too. I know you are doing all you can do for him, but what about you? The Icarus Trust is an charity which provides a free Family Friend, who is someone for you to speak to. And then there is a signposting service to help you find the best help for you, your family and your situation. Please get in touch with them on info@icarustrust.org or go to their website http://www.icarustrust.org.
I really hope this is some help for you. All the best.