The majority of people who have narcissistic traits do not have an actual psychiatric disorder such as Narcissistic Personality Disorder (NPD). The traits of narcissism are characterized by some key patterns such as controlling, lack of empathy, arrogance, admiration seeking, attention-seeking, a propensity to envy, and difficulties with emotional regulation.
When you engage yourself in a committed relationship with a narcissist then your relationship will be like a honeymoon phase and they will not show any red flags or their true colors to doubt them in the beginning.
Write something about yourself. No need to be fancy, just an overview.