How can I help my brother?

I was in a relationship in which the same thing happened to me that happened to your brother. It really sucks and sometimes the best thing you can do is just tell him that you're there for him if he needs to talk. Don't force him into talking because a lot of times that will just push him away. If you don't have time to speak with him face to face leave a note, just let him know that in your eyes he's still awesome and that time heals all wounds. I wish the best of luck to you and your brother. He deserves better. (Hugs help sometimes too).