I'm sorry to hear about your brother's state also. I agree with what has already been suggested, that you can't make him seek help. I would say that you can mention it to him and then let it go. And I think the best thing you can do is to continue being the loving sister - I'm assuming your his sister because of your name that you have been, and just love him and be there for him as much as you can. And take care of yourself, be careful not to get pulled down by caring "too much" if you know what I mean. Love him and let go rather than worrying about him and always trying to help. If you are taking good care of your own life then that will naturally help him.