...she could not for a moment suppose that those wishes, however openly or artfully spoken, could influence a young man so totally independent of every one.

Now we see the foreshadowing in Ch 10, where Darcy and Elizabeth argued over Bingley's impetuousness:
"You appear to me, Mr. Darcy, to allow nothing for the influence of friendship and affection. A regard for the requester would often make one readily yield to a request without waiting for arguments to reason one into it.... We may as well wait, perhaps, till the circumstance occurs before we discuss the discretion of his behaviour thereupon. But in general and ordinary cases between friend and friend, where one of them is desired by the other to change a resolution of no very great moment, should you think ill of that person for complying with the desire, without waiting to be argued into it?"

"Will it not be advisable...to arrange with rather more precision the degree of importance which is to appertain to this request, as well as the degree of intimacy subsisting between the parties?"

We now have a circumstance which Elizabeth can evaluate, and Bingley does not come off well!

In Ch 24 Elizabeth could not think without anger, hardly without contempt, on that easiness of temper, that want of proper resolution, which now made him the slave of his designing friends...