In ch. 50, we finally have clear evidence that Elizabeth is now definitely in love with Darcy:

She was humbled, she was grieved; she repented, though she hardly knew of what. She became jealous of his esteem, when she could no longer hope to be benefited by it. She wanted to hear of him, when there seemed the least chance of gaining intelligence. She was convinced that she could have been happy with him, when it was no longer likely they should meet...She began now to comprehend that he was exactly the man who, in disposition and talents, would most suit her.