Sex & the Single Woman: Only Friends?

I have often heard guys talk about an elusive “just friends” zone in which women categorize men. Allegedly, once a guy has been placed on this list, there is no return to the realm of “potential boyfriend.”

After considering the own men in my life, I am quick to deny that I categorize men, especially not to that extent. But after a closer look, I realize that it is in someway true.

I do have a tendency to consider some guys as “only friends.” Not to say that that status can never change, but it definitely is there. Is there a way that we can stop ourselves from classifying men like this, or is it an inherent quality that we women can never change?