Hello, I would like to ask about one of my close friend, from past few months (almost 4 month) he is very depressed and lack of complete awareness about his family and others and also keep on thinking something very deeply and smile on his own, Not eating food properly, not sleeping in night and will become very irritated when someone ask him to do something (stare continuously in an angry manner) and sometimes not answer to anyone even though asking multiple times. Also habits of smoking weed from a long time (1 year). Note: Sometimes acts normal. Keep on roaming in a small surrounding (continuously thinking) Please suggest.