I don't mean to be rude when I say this, and I say this from experience of my own self...it sounds like you are co-dependent. There is a very good book out about it that has helped me understand this so much. It is titled:
Beyond Codependency by Melody Beattie. I would suggest that you get yourself a copy.
Also have you considered asking your brother to get some therapy for himself? It sounds like he can afford it. At least he can have someone else to lean on in that department.
I think this is all too much for you to handle by yourself. I'm afraid to say, in my opinion, that if you keep allowing all of this without putting your foot down and drawing some lines that you are going to be making yourself very ill.
I wish you all the best.
I'm glad you're starting to see things a little more clearly. I think it is wonderful that you found the book and will be getting it soon. I'm sure it will help a lot.
Wishing you wellness.
Hey you bug a boo...how do you do???
Just checking up on you? Hoping things are a little better for ya. Hope you have a good weekend.
Glad to see you're keeping us updated. It seems you're getting a lot of support from your friends around here who care.
Obviously, just as suspected, your brother has issues of his own that he needs to work on by himself.
You also have your own health concerns to take care of and you don't need your brother's issues distracting you from it.
You're doing a good job with sticking to your guns. I would just tell him point blank, "Time to leave and take care of yourself." You owe it to yourself and your own family.