Warning signs of serious depression                    

·         Social withdrawal

·         Poor communication and sharing

·         Reduced effort and involvement with others

·         Changes in friends, preferring to be around people who are angry or negative

·         Loss of interest in things you used to like doing

·         Insomnia or increased or decreased sleep

·         Defiance

·         Dishonesty

·         A strong "I don't care" attitude

·         Preoccupation in dress, color, poetry, music, peers or attitude

·         Poor impulse control

·         Reduced honest cooperation with authority figures

·         Discussions of lack of pleasure in life or reason to live

Source:  http://www.teen-matters.com/depression.html.