Answer:
Schizoid Personality Disorder
Step-by-step explanation:
People who suffer from Schizoid Personality Disorder prefer their own company to the company of others. They have very few friends and are often described as loners. This comes across as disinterest in relationships, including romantic relationships and those with family. Sufferers of this disorder struggle to express their emotions.
In this example, Fred prefers not to socialise with others and avoids other people, thus indicating that he has Schizoid Personality Disorder.