Someone with Narcissistic Personality disorder (NPD) has at least 5 of these symptoms:

• has a grandiose sense of self-importance (e.g., exaggerates achievements and talents, expects to be recognized as superior without commensurate achievements)
• is preoccupied with fantasies of unlimited success, power, brilliance, beauty, or ideal love
• believes that he or she is "special" and unique and can only be understood by, or should associate with, other special or high-status people (or institutions)
• requires excessive admiration
• has a sense of entitlement, i.e., unreasonable expectations of especially favorable treatment or automatic compliance with his or her expectations
• is interpersonally exploitative, i.e., takes advantage of others to achieve his or her own ends
• lacks empathy: is unwilling to recognize or identify with the feelings and needs of others
• is often envious of others or believes that others are envious of him or her
• shows arrogant, haughty behaviors or attitudes