Sorry to hear this.
You are carrying a burden that is not yours to carry. Your brother's girlfriend treated him horribly and broke up with him. That is no reason to use drugs. A lot worse things happen to people and they do not turn to drugs. Nothing justifies drug use. Nothing.
You need to let him know you love him and you want him to get help and then begin to detach and take care of yourself. You cannot make him revert back to who he was before all of this started. He is the only one that can change himself.
We've all had to learn that the hard way but it is the truth.
We are here for you. Stay strong!
