How do Crooks' words to Lennie about loneliness reinforce this theme of the novel?

Although Crooks is intensely lonely, he is hurt and we feel his pain when Lennie stops by to visit. Crooks's loneliness and isolation is an extension of the loneliness that pervades all the people on the ranch. Crooks personifies this solation because he is black in a society of mostly white males,

"S'pose you didn't have nobody. S'pose you couldn't go into the bunk house and play rummy 'cause you was black. How'd you like that?"

"A guy goes nuts if he ain't got nobody. Don't make no difference who the guy is, long's he's with you. I tell ya, I tell ya a guy gets too lonely an' he gets sick."