This is a wonderful thing you are doing, Sherry. There are so many people who don't have the help and friendship that you've shared. You definitely made a difference in his life!
I think you need to talk to him and tell him how much you care about him. You are concerned for his safety and health. With better care, he might not need to go to the hospital again. Bring up as many positives aspects of living with assistance as possible. Hopefully, you'll be surprised and he'll accept what you are saying. And as others have said, do involve any resources available at the hospital to speak with him about his need for better care.
Good luck! Please let us know how it turns out.
annie
Time is a companion that goes with us on a journey. It reminds us to cherish each moment, because it will never come again. What we leave behind is not as important as how we have lived." Captain Jean Luc Picard