“He wont have to worry about you spilling his secrets.”
“Yeah,” Jace said, “he‘s terrified I‘ll tell everyone that he‘s always really wanted to be a ballerina.”
-Inquisitor & Jace about Valentine, pg.123-”

“Well, I hate to tell you this," she said, "but your friend is an asshole."
"He's not my friend," said Simon. "And I couldn't agree with you more, actually."
-Maia & Simon about Jace, pg.49-”

“Not everyone wants you all the time, Jace," he said.
"Don't be ridiculous.”

“Jace hated it when other people were worried on his behalf. It made him feel like maybe there really was something to worry about.”

“You have a dark heart in you, Valentine’s daughter,” he said. “You just won’t admit it. And if you want Jace, you had better accept it. Because he belongs to me now.”

“I think,” Jace said, “that you don’t want to tell your secrets, so you decided to break up with Alec because…”

“At least," she said, "you don't have to worry about rejection, Jace Wayland."
"Not necissarily. I turn myself down occasionally, just to keep it interesting.”

“Magnus wants to shout at me, don’t you, Magnus?” (Jace)
“Yes,” Magnus said, tearing his eyes away from Alec long enough to scowl.
-pg.275-”

“Have you fallen in love with the wrong person yet?'
Jace said, "Unfortunately, Lady of the Haven, my one true love remains myself."
…"At least," she said, "you don't have to worry about rejection, Jace Wayland."
"Not necessarily. I turn myself down occasionally, just to keep it interesting.”

“Jace likes to pretend that everyone isn’t talking about him, even when he knows they are.”