Hey, I don't really know you or your brother, but I can tell you two things.
My own brother has a very serious mental problem. It's painful and worrying, not only for him, who suffers from a terrible illness, but also for me and for my entire family. It's hard seeing him like that while trying to understand what the hell is going in his mind. For years I struggled with this and I can tell how hard, painful and confusing it can get.
For my experiencie I can tell you that you need to go to therapy yourself. You need certain questions to be answered (by a specialist), to cope with your own personal pain and to lern how to let go the urge of changing something which is definitely NOT in your power.
It's hard, and It requires time and acceptance. In your case I believe the main problem lies in the fact that your brother doesn't want to go to therapy, but remember that he can change his mind — and hopefully he will. Meanwhile you need to take care of yourself, and work on your own suffering, which I can tell is really bad. </3
It gets better, I promess.
