I think he's saying he wants to be somebody that he knows he could be but isn't and he wants to change. He keeps letting her down and he never is there for her, he is more like a dream but he is hoping "someday" he will be able to be there for her.
I think he's saying he wants to be somebody that he knows he could be but isn't and he wants to change. He keeps letting her down and he never is there for her, he is more like a dream but he is hoping "someday" he will be able to be there for her.