Mr. Collins, meanwhile, was meditating in solitude on what had passed. He thought too well of himself to comprehend on what motive his cousin could refuse him; and though his pride was hurt, he suffered in no other way.

Rejection and hurt pride are paralleled here. First it is Elizabeth who is rejected by Darcy at the assembly and caused her pride to be hurt. Now it is Elizabeth who rejected Mr. Collins and hurt his pride.

However, look at how they react to the rejection:

Elizabeth remained with no very cordial feelings towards him. She told the story, however, with great spirit among her friends; for she had a lively, playful disposition, which delighted in any thing ridiculous. Chapter 3

As for the gentleman himself, his feelings were chiefly expressed, not by embarrassment or dejection, or by trying to avoid her, but by stiffness of manner and resentful silence. Chapter 21