^ My own analysis was that the premise was that she had sent the song to her ex-boyfriend/lover on a disc, and he had listened to her words and cut them off having heard enough, muttering 'yeah right' and never listening to it again, as in she was telling the truth about her feelings but he didn't think so as they obviously didn't translate into actions and he wouldn't be waiting for her because of that.
It really is a self-depreciating track. She was harsh on herself, young Ayu.