And I don't see nobody else
I see myself, I'm looking at the..
He feels as if he is on his own. He sees nobody else by his side. Also, he is saying he doesn’t blame anyone else, its his actions he speaks of.
When you act in front of people, you are not only yourself, but you are many characters, doing thing to be proved worthy. But when he looks at himself in the mirror, he only sees himself, and not the other persons, that he is trying to be.
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