Ok brother, your brother is mentally not getting the idea of what he is doing, he Thinks his presence is not useful for anyone. As i prefer you to take him to a good psychiatrist as he was in the same attitude from childhood,it is little bit difficult for you to change him.
Thanks Bro .But Please have a look on below points :
1. This behaviour is not from childhood as he is involved in schooling and other academics .He performed very well till completion of his graduation .Now he is facing such problems as he is free now and things are getting worst day by day.
2.He knows what he is doing . He just dont wanna change himself .
3.He dont want to come to psychiatrist as he didnt think he is doing something wrong .
4.he is not doing any bad or dangerous things . He jus woke up , have bath , lunch dinner and sleep .