I just think that it's a song about a phone conversation with his girlfriend...he says something in passing that hurts her and suddenly everythings bad, they are having an argument. He just wants to leave it...he "nods", but obviously she doesn't know that. He knows he could make more effort with her, but he doesn't. He feels her pain, but doesn't try and make things better. He knows he's arrogant, but he doesn't try and change that.
I just think that it's a song about a phone conversation with his girlfriend...he says something in passing that hurts her and suddenly everythings bad, they are having an argument. He just wants to leave it...he "nods", but obviously she doesn't know that. He knows he could make more effort with her, but he doesn't. He feels her pain, but doesn't try and make things better. He knows he's arrogant, but he doesn't try and change that.