My sense is that this song is about a failed relationship - he makes plans but must abandon them because the person has either passed away, as mentioned above, or the person never matures despite time that goes by and never really becomes capable of a relationship. "Never get older" could mean that the love interest holds onto her youth to the point where she never grows out of childhood, never grows up emotionally.
My sense is that this song is about a failed relationship - he makes plans but must abandon them because the person has either passed away, as mentioned above, or the person never matures despite time that goes by and never really becomes capable of a relationship. "Never get older" could mean that the love interest holds onto her youth to the point where she never grows out of childhood, never grows up emotionally.