I do enjoy fanfic and the many variations on the stories and the characters but in the novel there is evidence that Jane is an intelligent, sensible woman and that despite her beauty had never been in love until she met Bingley. I doubt the woman JA describes would have been happy with a man she didn't respect.
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The children, two girls of six and eight years old, and two younger boys, were to be left under the particular care of their cousin Jane, who was the general favourite, and whose steady sense and sweetness of temper exactly adapted her for attending to them in every way -- teaching them, playing with them, and loving them.
Bingley is described by JA as intelligent and while not as clever as Darcy by no means deficient. As regards his decision not to pursue Jane,JA makes it very clear that he was determined to pursue her despite the objections of his sisters and Darcy to her connections.
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But, however this remonstrance might have staggered or delayed his determination, I do not suppose that it would ultimately have prevented the marriage, had it not been seconded by the assurance, which I hesitated not in giving, of your sister's indifference. He had before believed her to return his affection with sincere, if not with equal, regard. -- But Bingley has great natural modesty, with a stronger dependence on my judgment than on his own. -- To convince him, therefore, that he had deceived himself, was no very difficult point.
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Anxiety on Jane's behalf was another prevailing concern, and Mr. Darcy's explanation, by restoring Bingley to all her former good opinion, heightened the sense of what Jane had lost. His affection was proved to have been sincere, and his conduct cleared of all blame, unless any could attach to the implicitness of his confidence in his friend.
We are only given a glimpse of their conversations when he returned to Longbourn but there is evidence from what Jane said to E. afterwards that they did talk about the events that led to their separation and Bingley did have to explain himself.
Also we know from Darcy and also from Bingleys comments when he meets E. at Lambton that he has remained steadfast in his love for Jane. Bingley is young which explains his diffidence but he is also intelligent enough to know that his love for Jane could have caused him to believe she returned his feelings and blinded him to her indifference. Dare I say that Darcy might have benefitted from a bit of his modesty, it could have saved him from his Hunsford.
The part you refer to at the end of the novel where E. restrains herself from commenting is aimed more at teasing Darcy than denigrating Bingley in my opinion.
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She remembered that he had yet to learn to be laughed at, and it was rather too early to begin.
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Anxiety on Jane's behalf was another prevailing concern, and Mr. Darcy's explanation, by restoring Bingley to all her former good opinion, heightened the sense of what Jane had lost. His affection was proved to have been sincere, and his conduct cleared of all blame, unless any could attach to the implicitness of his confidence in his friend.
I will stop before this turns into an essay