Peeta listened to Finnick. His friend was just mirroring all of the things that Peeta was feeling inside of himself. It helped to know he wasn't alone, but at the same time he wanted to fix it for Finnick as much as he wanted to fix it for himself.
"I know what you mean," he admitted with a small shrug and a little nod of his head. I think it helps a little that I've been helping someone else; Annie, but it still doesn't erase what I've done. It's hard to separate who I am in my dreams from who I am here. It still feels like I killed that girl even though I didn't really do it."