Time.

And so he said to her; "I will never forget you. Cast me aside, Accost me, beat me, spit in my face. I deserve it. I hurt you, and the facts that kill me will never be enough. I will wait for years for you- FORGET YEARS; a lifetime.". She had already walked away, and so he sat and waited. he's still waiting. He always will be. He can't admit the truth he's hidden from himself, She's gone.