She appreciated that he didn't try to tell her it would never happen again. He was acknowledging it could, and telling her what he would do if that happened. "I know you will," she said, because she did know Will would fight for her and search for her as long as he still had breath.
"I hope you're ready for me to voice every single thought I have in my head and to talk to myself out loud and to fill every silence- It was awful. He said- He said he didn't need a woman to speak."