He touched her face, gently, with the back of his hand. 'you disappear so completely into your head sometimes.' he said. 'i wish i could follow you.'
you do, she wanted to say, you live in my head all the time

You could have fooled me. Everytime I called you, Luke said you were sick. I figured you were avoiding me. Again."
"I wasn't. I did want to talk to you. I've been thinking about you all the time."
"I've been thinking about you, too."
"I really was sick. I swear. I almost died back there on the ship, you know."
"I know. Everytime you almost die, I almost die myself.

You guessed? You must have been pretty sure, considering you could have killed me."
"I was ninety percent sure."
"I see," Clary said. There must have been something in her voice, because he turned to look at her. Her hand cracked across his face, a slap that rocked him back on his heels. He put his hands on his cheek, more in surprise than pain.
"What the hell was that for?"
"The other ten percent.

You're my sister," he said finally. "My sister, my blood, my family. I should want to protect you"—he laughed soundlessly without any humor—"to protect you from the sort of boys who want to do with you exactly what I want to do."

Clary's breath caught. "You said you just wanted to be my brother from now on."

"I lied," he said. "Demons lie, Clary. You know, there are some kinds of wounds you can get when you're a Shadowhunter—internal injuries from demon poison. You don't even know what's wrong with you, but you're bleeding to death slowly inside. That's what it's like, just being your brother."

"But Aline—"

"I had to try. And I did." His voice was lifeless. "But God knows, I don't want anyone but you. I don't even want to want anyone but you." He reached out, trailed his fingers lightly through her hair, fingertips brushing her cheek. "Now at least I know why."

Clary's voice had sunk to a whisper. "I don't want anyone but you, either.

His fingers skimmed down her body, over skin and satin, and she shivered, leaning into him, and she was sure they both tasted like blood and ashes and salt, but it didn't matter; the world, the city, and all it's lights and life seemed to have narrowed down to this, just her and Jace, the burning heart of a frozen world.

And I'm suppose to sit by while you date boys and fall in love with someone else, get married...?" His voice tightened. "And meanwhile, I'll die a little bit more every day, watching.