[He does not look the slightest bit reassured.] What would I have done, back then? On the Indy, without you? I didn't even know how to live anymore, Horatio, let alone function as midshipman on a frigate, and without you, I didn't have the will to try.

[Not something he's proud of, how completely dependent he had been on Horatio, emotionally, and he's not sure Horatio really ever grasped how bad it was.]