How does Austen create character in chapter 11?

To an extent i feel that Austen uses effective techniques of creating character,However this theme isn't carried throughout the whole of the novel, in Chapter 11 it could be said she uses quite poor methods more often that not.

Firstly, i would like to focus on the fact that Austen relies on other charcters and the characters themselves to describe their characteristics;
'He began to feel danger of paying Elizabeth too much attention.'
The further i engroce Austens use of this i seem to find, that this quote inparticular shows that there is vast amounts of self awareness from the prejudice character Darcy, this theme is stretched out through the novel, A prime example is from this quote we find that Darcy is quite cautious, and carries a vacarious amount of self awareness, An interpretation that could be picked up from this is that self awarness is why Darcy comes across as so proud and prejudice, it could be argued that Darcy can afford to be somewhat stuck up from his well to do family background and he knows no different, as he has always been brought up as part of a high maintenance family.

Throughout chapter 11 Darcy and Elizabeth and the narrator are used to exploit characters and their personalities and traits;
'unconsciously closed his book'
Darcy's attention is so drawn to beautiful Elizabeth the book that he was previously so foccused on is shut unconsciously, suggesting intimacy between the two charcters.
However, i feel that intimacy between the two is described through dialogue and we find very little about the characters, this is why i feel Austen was so concentrated on showing the flirting between Darcy and Elizabeth she forgot to express the characters to her audience, little interpretations could be picked from this chapter unfortunatly.