What is something Bella told Edward she noticed about him?

Bella: "You're impossibly fast. And strong. Your skin is...pale white, and ice cold. Your eyes change color...and sometimes you speak like - like you're from a different time. You never eat or drink anything, you don't go into the sunlight. How old are you?"

Edward: "Seventeen."

Bella: "How long have you been seventeen?"

Edward: "... a while."

Bella: "I know what you are."

Edward: "Say it...out loud. Say it."

Bella: "Vampire."

Edward: "Are you afraid?"

Bella: "No."