Who is "they"? It was probably a picture that someone posted on a social networking site, and someone found a link to it and posted it on a forum. And then 100s of other people re-hosted the images on other sites. And then someone made a motivational poster out of it. That's my guess at least.
Newsflash, friendzone doesn't exist.
Its an excuse to put you down softly.
Not any other reason. Its not because your close friends, its because she doesnt see you that way.