Re: i m extremly sad and dejected
when your brother proclaims that he do all those things that ALLAH SWT forbid us to do then how come she can like him 
what exactly she likes about your brother?
ps. his marriage will also bring problems for you. i think you should talk to your mother that your brother is UnFit For Marriage, and also talk to you brother that kisi or ma bhen baiti ka bayshaq khial mut rekho lakin apni ka zaroor rekho.
and also You Dont Wana Call him your Brother.