It's kind of an angry song. That person is within everybody, I think everybody has this ability to try and be everything to everyone, to try to please. I think there are two aspects of it - there's the pleaser, who doesn't always show his true self, always plays nice and as time goes on shows more and more of himself, but there's also the people who are everything to everyone who are manipulators and users.
Everyone is you and me but not hiiiiiiiim!