Yes I know it's a love song- but if you look at it further the Andantes are replacing her friends and she secretly misses her friends especially Flo and reflects the good ol' days of singing with the Primettes up to 1964 and the "reality" of what she has done.

Yes Flo was very much alive but HDH was scarred by Flo's firing and wrote a psychedelic piece about what life used to have been in disguise of a love song. It's like they knew Flo was going to die young and never have a fair chance.

Is my theory correct?