In Of Mice and Men, at the end of the novel. 'You . . . . an' me. Ever'body gonna be nice to you. Ain't gonna be no more trouble. 'Nobody gon-na hurt nobody nor steal from 'em." Lennie said, "I thought you was mad at me, George."
"No," said George. "No, Lennie. I ain't mad. I never been mad, an' I ain't now. That's a thing I want ya to know."
The voices came close now. George raised the gun and listened to the voices.
Lennie begged, "Le's do it now. Le's get that place now."
"Sure, right now. I gotta. We gotta."..'

How can we tell that George feels emotional at this point, indicating his sadness at losing the dream / killing his friend?