This song is about a girl who hooks up with the same guy over and over and has him but at the same time she doesn't. He is so close to her and she says that she wants him so badly but not like the way she has him because to him, she will be nothing more than just a fuck buddy. So, in the end all she has of him is his shadow, always kind of there but not in a solid way like she wants him - as a boyfriend, not a hook-up.
This song is about a girl who hooks up with the same guy over and over and has him but at the same time she doesn't. He is so close to her and she says that she wants him so badly but not like the way she has him because to him, she will be nothing more than just a fuck buddy. So, in the end all she has of him is his shadow, always kind of there but not in a solid way like she wants him - as a boyfriend, not a hook-up.