Answer:
His psychologist believes he displays a high level of narcissism.
Step-by-step explanation:
Narcissism is a psychological tendency in which an individual tends to have an extreme admiration of him/herself. This admiration can turn into a grandiose belief and could even develop into the Narcissistic Personality Disorder.
In this case, Vincent displays excessive self-love and self-absorption. It would not be assumed that he is developing the personality disorder but he is displaying high levels of narcissism.