might I suggest:

Little girl - dreams never last
Little girl - childhood goes by so fast
Little girl - you look so happy
Little girl - when did your life get so crappy/messed up/complicated
Little girl - if only you knew
Little girl - I miss you

Byttede om på linjerne med "you knew" og "miss you" for effektens skyld og ændrede live til life

I long for those days
Life was so simple, in all it's mundane ways
I wish you didn't have to grow up
I wish you weren't me
Oh little girl, I miss those day I was you

Lovely little piece:)