Jace Herondale: You're nervous. Why are you nervous?

Alec Lightwood: What? I'm... I'm not nervous.

Jace Herondale: Yes, you are. What's going on?

Alec Lightwood: I'm, uh, proposing to Magnus tonight.

Jace Herondale: What? Are you serious? Alec, congratulations. You're about to make Magnus the happiest man in the world.

Alec Lightwood: Yeah. I just want everything to be perfect.

Jace Herondale: Listen to me. It's not gonna matter what you do or what you say when he realizes he gets to spend the rest of his life with you.