"Her name was Rose."
Just saying her name hurt, like knives had stabbed into his hearts and were being twisted, slowly and maliciously. But Donna had been brilliant, and she deserved to know. "Rose Tyler."
"I'm sorry you lost her."
"She made me better. She told me when to stop. My pink and yellow human. I never should've brought her with me. She loved me and now her life has been ruined."
"You love her." It was a statement, not a question. "Was it worth it, Doctor? You two?"
"Yeah."
"Then don't regret it. Some things are worth the heartbreak."