A Narcissist is unable to feel empathy or concern for anyone but him/herself. A relationship with a Narcissist is very damaging to the other. I spent three years recovering from such an experience.
Your friend used the word, Narcissist, casually, probably ignorant of the true meaning.
There is nothing wrong with having high self-esteem. Beware if he wants you to feel inferior and grovel for him....HE may be a Narcissist!!!
Seeker