You and I - 50 баллов

You are not you. What you are, is not what I am.
I am you. You're the one that's not you.
I don't live yet and apart of you, I don't need to be.
But I'm not what you'll be, I'm just one result.
But we might be one in fact.
Because of you, I have to be. Without you, there is no me.
Who am I?

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