Pride and Prejudice Volume 1, Chapter 4
Jane likes Bingley a great deal, she admits when she's alone with Elizabeth. He's handsome, charming, and kind. She also hit it off with Bingley's sisters, Miss Bingley and Mrs. Hurst. Between Elizabeth and Jane, the only other sensible Bennet girl, the sisters cannot figure out how someone as agreeable as Bingley would be friends with the proud and rude Mr. Darcy. "Bingley was sure of being liked wherever he appeared, but Darcy was continually giving offence." Volume 1, Chapter 4, pg. 10
Bingley is pleased with the ball and the society of the country people, but Mr. Darcy, a man more difficult to impress, is not as happy with the evening or the people. While Darcy agrees that Jane is pretty, he, like Bingley's sisters, thinks that she smiles too much. Bingley's sisters forgive Jane her smiling and think that she is sweet anyway, and Bingley feels that this is approval enough for his admiration for Jane.