Narcissistic Personality Disorder is characterized by a long-standing pattern of grandiosity,
an overwhelming need for admiration and a complete lack of empathy toward others. People with this disorder believe they are the most important person in everyone’s life. They often have no problem belittling, manipulating and stepping on others to gain attention or to get ahead. If you’re in a relationship with a narcissist, you may be the last one to realize it. This is because they are masters of manipulation.