All my son's friends have drifted away from him and on facebook he only friends people far away. What is wrong?

Other things 2 look . Dr bansal is quite correct. I would add that one should be ever vigilant and suspicious of alcohol or drug use as a cause for changes in an adolescent's demeanor, behavior, social skills, or grades. Also, some diseases may present with withdrawn behavior, such as depression, thyroid disease, and anemia.