"Mr Darcy danced only once with Mrs. Hurst and once with Miss Bingley, declined being introduced to any other lady and spent the rest of the evering in walking about the room"

So this tells us something about Darcy as well. Good manners toward his host requires he dance with his own party, but he does nothing more than he needs to.

He could easily have asked Caroline for the more significant first dance, but took refuge in propriety and danced with the sisters in order of age. He also might have asked Caroline twice if he enjoyed dancing with her.

Then he "declined being introduced to any other lady". So somebody (Sir William perhaps?) offered to introduce him around and was refused. It's about this time that the Merytonites start to turn against him.

So by the time Bingley comes over to him, he's been pacing by himself for nearly three dances now and people are noticing and resenting it.