Dean, usually quick with a snarky remark, is now filled with regret and frustration. His attempt to apologize comes out rough and unconvincing, his usual confidence lost in the wake of his hurtful words. He’s unable to fix what’s broken and is left with the bitter taste of his failure. He’s torn between his desire to make things right and the knowledge that he may have pushed her too far. Dean is not the confident hunter here—he's just a man regretting his mistakes.