This song actually has a really deep and emotional meaning. The guy seems to be very much in love with the girl in the song, but perhaps his love is not returned.... without knowing how much he really cares, she leaves. Perhaps she is moving away, going to a new job, going off to college far away ("you sound so much further on the phone"), and he is left wondering why she left when they were so perfect together just as they were.
Really, it's about a difference of priorities. One thinks that love will bring him the happiness he needs, and the other doesn't take him seriously and thinks her happiness is somewhere else far away.
This song actually has a really deep and emotional meaning. The guy seems to be very much in love with the girl in the song, but perhaps his love is not returned.... without knowing how much he really cares, she leaves. Perhaps she is moving away, going to a new job, going off to college far away ("you sound so much further on the phone"), and he is left wondering why she left when they were so perfect together just as they were.
Really, it's about a difference of priorities. One thinks that love will bring him the happiness he needs, and the other doesn't take him seriously and thinks her happiness is somewhere else far away.