I have a friend. I think he is in depression. He don't talk anything, he just keep on thinking something, he doing strange activities, like eating slowly, not interact with anyone. He is totally different as he was before this. He was a most active and happy among us. But don't what happened. This happened when we were in a competition of all India NCC. Suddenly don't know what happened he was behaving like a different one .so please what should I do to cure him .plz I need consult as fast as possible. I will b happy for that.