He takes Lennie along with him and looks after him when he could just leave him or put him in a mental asylum.
He's afriad that they would lose their job if The Boss knew about Lennie. The Boss would think Lennie would be some useless person that he's paying for nothing. That is why George emphasizes on how strong he is, because Lennie is very strong. And would be helpful to work. George had said they were cousins because The Boss was thinking that George had been bringing Lennie around to jobs, secretly stealing Lennie's money; Tricking his older bosses. Though George would never do this; He needed Lennie and Lennie needed him.
George tells Lennie to fight back and defend himself if Curley hits him. George wants Lennie to stand up for himself and not allow others to take advantage of him.
Carlson asks if Lennie had his gun and if George took it from him and killed Lennie. George responds, "Yeah. He had your gun...Yeah. Tha's how."
In the opening dialogue between George and Lennie in John Steinbeck's "Of Mice and Men," Lennie's forgetfulness, childlike nature, and dependence on George are hinted at through his repeated requests for George to tell him about their dream of owning a ranch. George's protective and authoritative tone towards Lennie also suggests a dynamic where George takes on a caretaking role for Lennie.
GEORGE killed LENNIE because Curley was going to find him and shoot him anyway. George wanted Lennie's last few moments to be happy, so he decided to do it himself and tell him a story beforehand.
go hide in the bush until george come for him
because to lennie his jokes didnt have an end. like it was serious to him, he would do what george would tell him to do even if it able to kill him
He says that Lennie was kicked in the head by a horse and that he was George's cousin.
Crooks tells George that Lennie is a nice fella because he recognizes Lennie's genuine kindness and innocence. Despite Lennie's mental disability and social awkwardness, he doesn't have any malice in him and treats others with kindness. Crooks appreciates Lennie's sincerity and straightforward nature.
George tells Lennie to go back to the brush by the river and hide if he gets in trouble.
George tells Lennie that he could get along so well without him because he is frustrated with the mistakes and trouble that Lennie often causes. However, deep down, George cares for Lennie and doesn't truly mean what he says. George knows that Lennie depends on him for guidance and protection.
George tells the other ranch workers that Lennie stole the gun and accidentally shot himself while trying to escape. He does this to protect Lennie's innocence and spare him from facing a violent death at the hands of Curley and his men.