His brother is against us being together and he's stolen he ring, and threatened to kill him?

Report the ring stolen to the police and tell them who has it. Also charge him with ault and battery. You have to take a stand for you and your boyfriend or he is never going to learn that it is wrong to do what he is doing. When he goes to jail for gay bashing hell change his attitude fast when he sees that he can't get away with it. Congratulations on your relationship. I hope it lasts.