Schizoid Personality Disorder as a pervasive pattern of detachment from social relationships and a restricted range of expression of emotions in interpersonal settings, beginning by early adulthood and present in a variety of contexts, as indicated by four (or more) of the following:
neither desires nor enjoys close relationships, including being part of a family;

almost always chooses solitary activities;

has little, if any, interest in having sexual experiences with another person;

takes pleasure in few, if any, activities;

lacks close friends or confidants other than first-degree relatives;

appears indifferent to the praise or criticism of others;

shows emotional coldness, detachment, or flattened affectivity.

IT's best though for him to go to a doctor and see what him/her thinks, there could be other possibility's as well.

Welcome to the boards!!

<font color=red>~Sundance~</font color=red>

<font color=blue>"Never react emotionally to criticism. Analyze yourself to determine whether it is justified. If it is, correct yourself. Otherwise, go on about your business."</font color=blue>

<font color=black>Norman Vincent Peale</font color=black>