My brother is 17 years old. He is 10 std repeating because of his unique nature he is not comfortable with family he can't even share his problems with us. He gets rude with family. He've frnds but they all r elder than him like his friends is appx of 20-25 age they aren't good ppls lafanga types. We talked to him but he don't speak a single word he don't even do eye contact with anyone. .what to do please help me.