Narcissists (but also many with cluster B disorders) react disproportionately to these events. For example, if you tell your friend that you are not interested

Narcissists (but also many with cluster B disorders) react disproportionately to these events. For example, if you tell your friend that you are not interested or available for some suggested activity, they may lash out with verbal abuse rather than say “oh ok”. Or they may manipulate you into doing the thing by suggesting that your friendship would be over if you say no, they are considering suicide, etc. A single event like this may not indicate a disorder but making a pattern of this kind of thing is definitely not normal and is pathological.