I think this song is amazing. I think it is about a relationship between a boy and a girl where the boy knows how much he screws up. He finally realizes how much they argue and fight. But he knows how much he's in love with her. He has realized his mistakes and wants to let her know that she is his world and without her he'd be broken. He just wants her to know and understand how much he really does care about her. You recognize it when you're going through it.