The analyses of a text #1

The narrator recalls his adolescence.
He came to the local lawyer, Mr. Wickfield' house, which he boarded at as he went to a school, after a long time.
Mr. Wickfield's only daughter Agnes is his best friend and counselor.
Mr. Wickfield's partner Uriah Heep, who is crazy for Agnes, and his mother live with Mr. Wickfiled in Mr. Wickfiled's.
Now Uriah Heep is trying to have Mr. Wickfield drunk on wine.

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'We seldom see our present visitor, sir,' he said, addressing Mr. Wickfield, sitting, such a contrast to him, at the end of the table, 'and I should propose to give him welcome in another glass or two of wine, if you have no objections. Mr. Copperfield, your elth and appiness!'
I was obliged to make a show of taking the hand he stretched across to me; and then, with very different emotions, I took the hand of the broken gentleman, his partner.
'Come, fellow-partner,' said Uriah, 'if I may take the liberty, - now, suppose you give us something or another appropriate to Copperfield!'
I pass over Mr. Wickfield's proposing my aunt, his proposing Mr. Dick, his proposing Doctors' Commons, his proposing Uriah, his drinking everything twice; his consciousness of his own weakness, the ineffectual effort that he made against it; the struggle between his shame in Uriah's deportment, and his desire to conciliate him; the manifest exultation with which Uriah twisted and turned, and held him up before me. It made me sick at heart to see, and my hand recoils from writing it.
[David Copperfield by Charles Dickens]
1. I'd like to know if "such a contrast to him" is in apposition to "Mr. Wickfield."
2. I'd like to know what "make a show of taking the hand."
3. I'd like to know if the clause in blue the author directly says to the readers.
Thank you in advance for your help.