To be placed in the “friend zone” has a different meaning. To be put
there means that the woman placing you there wants you to do all of the
things that a boyfriend or husband would do: take her to dinner, travel,
movies, etc, with one important exception:
You will never see her naked, nor will she ever be yours.
The song that I think is the saddest and most beautiful song about this phenomenon is this one by Harry Connick, Jr. I know I’ve posted this before, but it is simply a beautiful song.