"I have to sit somewhere," the girl said to Tina in a firm, calm voice. (1.55)
"he sounds very angry, I bet he's just another jerk! " (pg 9)
In this part of the text, the main character Eleanor gets on the bus and has no seat. She tries to find one while the bus driver is yelling at her to sit down. Then Park, a boy she meets on the bus offers her to sit with a very sharp tone.
That girl—all of them—hated Eleanor before they'd even laid eyes on her. Like they'd been hired to kill her in a past life. (2.9)
The text says "Before he even decided to do it. Park scooted toward the window. "Sit down,' he said. It came out angrily. The girl turned to him , like she couldn't tell if he was another jerk or what" (pg9)
"Because…" he said quietly, looking at his desk, "because people want to remember what it's like to be young? And in love?" (10.50)
Not just new—but big and awkward. With crazy hair, bright red on top of curly. And she was dressed like… like she wanted people to look at her. Or maybe like she didn't get what a mess she was… Like something that wouldn't survive in the wild. (1.41)
This key part to the text makes the plot move forward because it lets Park and Eleanor meet. It lets the characters interact with each other for the first time which leads to the characters become closer later in the text. This part of the book let the two characters meet and get an impression of each other.
Immediately, Eleanor's isolated from her peers because of how she looks. They take one look at her and decide they're going to shun her. She doesn't even have a chance.
Here's Park's take on why Romeo and Juliet is so important. His opinion is a little more romantic.
When Park first sees Eleanor, he's almost shocked by how she looks. She's impossible not to notice, and he cringes inwardly, knowing she'll be a target for the kids on the bus.