Complex sentence: She has a romantic interest in William Darcy, although her feelings aren't reciprocated, and is later revealed to be attempting to manipulate events to keep Bing and Jane apart, as well as (to a lesser extent) stymie Darcy's feelings for Lizzie.
Split into simpler sentences: She has a romantic interest in William Darcy, although her feelings aren't reciprocated. She is later revealed to have attempted to manipulate events to keep Bing and Jane apart, as well as (to a lesser extent) stymie Darcy's feelings for Lizzie.