That's three hundred and fifty bucks I'd put in... How'd that be? " (p.87) This shows that he is fed up of being in a place where he is not wanted. He knows that he is going to get sacked soon, when he is no use at all, and he will have no place, no friends and no life to turn to. That is why he is sacrificing his savings into a farm, which he could live the rest of his life in, in peace and comfort. Candy's desperate attempt to be a part of their dream shows us the amount of loneliness that exists for him.
I believe all the other characters on the ranch, such as Whit, Carlson, Slim and Curley, are all also lonely, but they seem not to care. Curley, however, even though he has a wife, seems to be lonely. Not very many people like him as he is not a very nice man. He wants to keep his place on the ranch by looking down on people, and by keeping his wife away from the other men. This has led for him to have no friends. This is probably why he goes to a brothel with other ranch men, as you have to be lonely to go to a cat