how does wickham explain darcy's friendship with bingley?

The below quotes are Wickham's explanation of his connection/ friendship with Darcy in a conversation with Elizabeth.

`Yes,'' replied Wickham; -- ``his estate there is a noble one. A clear ten thousand per annum. You could not have met with a person more capable of giving you certain information on that head than myself -- for I have been connected with his family in a particular manner from my infancy.''

`I have no right to give my opinion,'' said Wickham, ``as to his being agreeable or otherwise. I am not qualified to form one. I have known him too long and to well to be a fair judge. It is impossible for me to be impartial. But I believe your opinion of him would in general astonish -- and perhaps you would not express it quite so strongly anywhere else. -- Here you are in your own family.''

`I cannot pretend to be sorry,'' said Wickham, after a short interruption, ``that he or that any man should not be estimated beyond their deserts; but with him I believe it does not often happen. The world is blinded by his fortune and consequence, or frightened by his high and imposing manners, and sees him only as he chuses to be seen.''

`Oh! no -- it is not for me to be driven away by Mr. Darcy. If he wishes to avoid seeing me, he must go. We are not on friendly terms, and it always gives me pain to meet him, but I have no reason for avoiding him but what I might proclaim to all the world; a sense of very great ill-usage, and most painful regrets at his being what he is. His father, Miss Bennet, the late Mr. Darcy, was one of the best men that ever breathed, and the truest friend I ever had; and I can never be in company with this Mr. Darcy without being grieved to the soul by a thousand tender recollections. His behaviour to myself has been scandalous; but I verily believe I could forgive him any thing and every thing, rather than his disappointing the hopes and disgracing the memory of his father.''