What are some quotes from the novel Of Mice and Men that show Lennie's dependance on George?

You might want to focus on the opening chapter and
consider how the characters are presented and what that says about their relationship.
From the very start, it is clear that George is in a position of power over Lennie, and
as the story develops, we discover more precisely of what that position of power entails
and about their relationship. Consider, for example, how George is described as leading
the way into the clearing, with Lennie walking behind. It is clear that George is the
leader.

Then think of what George says to Lennie when
Lennie starts drinking water from the pool:

readability="8">

"Lennie!" he said sharply. "Lennie, for God's
sakes don't drink so much." Lennie continued to snort into the pool. The small man
leaned over and shook him by the shoulder. "Lennie. You gonna be sick like you was last
night."

Note the way that
Lennie is presented here, as we see him "snorting into the water like a horse." He is
clearly unable to know what is good and what is not good for him, and lacks both
restraint and sense. It is George's job to look after him and to make sure he doesn't
hurt himself, like he has already done from drinking too much the night before. George
is clearly the carer of Lennie, because Lennie is not able to look after
himself.