What you supposin' for? Ain't nobody goin' to suppose no hurt to George.
Chapter 5 (pg 99-100)
I don't want you to yell. You gonna get me in trouble jus' like George says you will.
Let go. You let go!
Chapter 6 (pg 116)
No Lennie. Look down there acrost the river, like you can almost see the place.
Lennie giggled with happiness.
This scene is about how much Lennie cares for George. Crooks keeps saying how George could get hurt which makes Lennie angry. Crooks is trying to break Lennie down, thinking he'll cry. Though in reality iy only makes Lennie worried and mad.
Even though Lennie is mentally disabled, he's still big and strong . Curley's wife started struggling when Lennie wouldn't let go of her hair, and so she started yelling, causing Lennie to go into a panic. Therefore he looses control of himself and won't stop until until everything calms down. Since she didn't calm down, Lennie accidentally broke her neck.
This chapter focuses on the idea of being mentally powerless. George is talking to Lennie about the farm as he's about to shoot Lennie in the back of the head. George did this so Lennie died non-painfully and happy. If Curley killed him, he would've died scared, painfully, and sad because he would've shot Lennie in the guts and tortured him.