The one thing I would add to this is in reference to the quotation' "we were too different not to". Ponyboy still does not recognize how alike he and Darry are. The prime reason Darry has so many high hopes for Ponyboy is that he recognizes much of himself in Ponyboy. Ponyboy will be granted the opportunities Darry had to give up to raise his younger brother. While it was stated that "the only thing that keeps Darry from being a Soc is us" the same could almost be true for Ponyboy. Ponyboy was in all the advanced classes with the Socs. He valued knowledge in (including aesthetic knowledge) which alone set him apart from the Greasers. Darry pushes Ponyboy so hard because he loves Ponyboy, yes, but also because Ponyboy is representative of Darry's lost dreams.
The two Curtis brothers struggle with their feelings about one another for most of the novel. Pony believes that Darry picks on him all the time and that he favors Sodapop, since Darry rarely yells at Soda. Pony realizes that most of Darry's stress comes from him working "too long and hard," and that he's "grown up too fast. Because Darry is the oldest brother and de facto head of the household, he takes his position seriously, and he wants to make sure that Pony stays in school and graduates--unlike Soda. When Darry hits Pony for coming home late, Pony begins to wonder about his older brother.
"I don't know... sometimes we get along okay, then all of a sudden he blows up on me or else is naggin' at me all the time. He didn't used to be like that... we used to get along okay... before Mom and Dad died. Now he just can't stand me."
But Pony misinterprets Darry's anger for hatred. Darry loves his little brother, and the decisions he makes are for Pony's own good. Pony finally recognizes this by the end of the story, when Soda tells them that he can't deal with the arguing all the time. When Darry and Pony both realize the pain they have caused Soda, they both agree not to argue anymore.
"No more fights. Okay, Ponyboy?" Darry said.
"Okay," I said. And I meant it. Darry and I would probably still have misunderstandings--we were too different not to--but no more fights.
Ponyboy and Darry couldn't agree on anything because Darry felt that whatever Ponyboy felt or thought was wrong. It wasn't because he was always trying to be mean, its because he wanted Ponyboy to have the opportunities that Darry couldn't have. Later on in the book, Darry and Ponyboy become closer to each other realizing that they are all that they have and they will need each other now that it is just the bot of them.
Ponyboy and Darry does not get along in the story during the beginning. But it was because Darry did not want Ponyboy to end up like him and drop out of school and do bad things. But later on they both got closer to each other.
Ponyboy and Darry didn't get along with each other at first, due to the fact that Darry doesn't want Ponyboy to fail school like him. But soon Ponyboy found out why he was tough on him and got along with Darry.