wanting what you could not have led to misery and madness

As the carriage whipped forward, they passed the alley she had spent so many days staring at—it was there, and then gone as they careened around a corner, nearly knocking over a costermonger pushing a donkey cart piled high with new potatoes. Tessa screamed.

Will reached past her and yanked the curtain shut. "It's better if you don't look," he told her pleasantly.

"He's going to kill someone. Or get us killed."

"No, he won't. Thomas is an excellent driver."

Tessa glared at him. "Clearly the word excellent means something else on this side of the Atlantic.

I'm trying to figure out how someone could live in a brothel for a month and not notice. You must be terribly dull-witted."
Tessa glared.
"If it helps at all, it seemed to be quite a high-class establishment. Nicely furnished, fairly clean..."
"Sounds as if you've visited your fair share of brothels," Tessa said, sourly. "Making a study of them?"
"More of a hobby," said Will, and smiled like a bad angel.

Gideon Lightwood said he was at the Institute in Madrid. What on earth was he doing there?'
'Faffing about, most likely', said Will.

Wo ai ni, Tessa,” he whispered. “Wo bu xiang shi qu ni.” She knew, without knowing how she knew, what the words meant. I love you. And I don’t want to lose you.

Will, the boy who loved the same books she did, the same poetry she did, who made her laugh even when she was furious. And here he was standing in front of her, telling her he loved the words of her heart, the shape of her soul. Telling her something she had never imagined anyone would ever tell her. Telling her something she would never be told again, not in this way. And not by him." - Clockwork Prince