Final answer:
Nicole's behavior suggests she has Avoidant Personality Disorder, as her fear of criticism and rejection leads her to avoid social interactions and doubt her own social abilities.
Step-by-step explanation:
Nicole's symptoms - being socially inhibited, oversensitive to negative evaluation, avoiding social interactions due to fear of rejection, and anxiety caused by less than immediate acceptance - are indicative of Avoidant Personality Disorder. This disorder is characterized by a pervasive pattern of social inhibition, feelings of inadequacy, and hypersensitivity to negative evaluation. People with Avoidant Personality Disorder are extremely anxious about being criticized by others, leading them to avoid social situations where they may be judged or rejected, despite a desire for affection and acceptance.