At the dance where she first meets Mr. Darcy, Elizabeth is sitting down because there are not enough male partners. She overhears Bingley urging Darcy to ask her to dance. Darcy says that Elizabeth is not pretty enough to tempt him. Elizabeth, naturally, is offended and thinks he is a arrogant jerk. She develops a dislike for him based on this first impression. She is determined from then on not to flatter the conceited man in any way. Of course, when she does not kowtow to him, he, naturally, falls in love with her. She then gets furious with him when she thinks he has broken up Jane and Bingley.
Elizabeth's view changes as she realizes that he is not the creep she had thought he was. He explains his reasons for thinking Jane and Bingley were not suited for one another (he thinks Jane does not really care much for Bingley), and he proves himself a good man when he helps bail Lydia out of her compromised situation with Wickham. Elizabeth also visits his estate, Pemberley, and realizes that it would be something to be mistress of such a place.