Gatsby is nervous about meeting Daisy at Nick's place. He is panicking and Nick tells him to stop acting like a little boy.
Hyperbole is the use of over-exaggeration to create emphasis or humor. I'm not exactly sure what to do for the last 2 things. Sorry
Answer:
Darry is hard on him but only because he wants the best from ponyboy and more. Sometimes he doesn't mean to do it intentionally and yells at him. That would really show why they don't get along.
Hope it helps and have a great day! =D
~sunshine~