[She wasn't upset at him about the things he'd said to her, but they had hurt in ways she couldn't explain at the time. In ways that she was only barely explaining now.
She doesn't want to hide ever again even if there is nothing visible to hide now. But at the same time it's so much harder being different alone than it is with someone else. If nothing else she knew Reid could understand that with his intelligence.
Kitty's cigarette is spent and she stubs it out there on the window sill, letting it rest there for the moment as she looks at him fully. The dull, flat look from earlier is gone replaced by emotions. Sadness. Hurting. Longing. She doesn't really feel better so much as she feels. Maybe that's a start.]