What do you call a person who doesn’t like crowds?

People with agoraphobia have an irrational fear of entering open or crowded places, of leaving one’s own home, or being in places from which escape is difficult.

Do introverts hate crowds?

Better yet, are you one? Either way, you’re probably aware that introverts typically dislike crowds and prefer the company of two or three close friends over a large social event. And some just prefer being alone, period.