dear sir....my best friend is studying final year of mechanical engineering in an university of good reputation. he has an extraordinary vision and intelligence over many aspects. but since few months he is constantly complaining me that he is lagging concentration in every aspect and his performance is degrading day by day. he wanted to be normal but he could not. he will ask me to help him overcome but i really could not. he complains me that there is something in his head which makes him feel worse and thus he wanted to die...please help me guide him and bring him back, sir