What quotes show that Crooks is lonely in Of Mice and Men by John Steinbeck?

In addition
to the fine quotes already provided, it is important to note that description, counterintuitive
as this seems, often conveys emotion. We can perceive Crooks' loneliness in the depiction of how
he is forced to live apart from the other men:

Crooks, the
Negro stable buck, had his bunk in the harness room; a little shed that leaned off the wall of
the barn. ... This room was swept and fairly neat, for Crooks was a proud, aloof man. He kept
his distance and demanded that other people keep theirs.

His loneliness comes through too as he says to :

"I aint wanted in the bunk house, and you aint wanted in my room. Why aint you
wanted? Lennie asked. Cause Im black. They play cards in there, but I cant play because Im
black. They say I stink. ..."

We can imagine the
loneliness Crooks experiences at the kind of wholesale rejection he is subjected to because of
his race, segregated into a separate room with only a box of straw to sleep in.

Crooks' loneliness reveals itself for a moment in his expression of longing to be part
of the ranch Lennie,and Candy dream of owning. Crooks offers to work for nothing to be part of
this community:

. . . . If you . . . . guys would want
a hand to work for nothingjust his keep, why Id come an lend a hand. I aint so crippled I cant
work like a son-of-abitch if I want to.

Much as Crooks
accepts his loneliness, he would give almost anything to end it.