The state of being denied relationship status because the other considers you a "Friend they don't want to lose". This more commonly affects men, as women get too into the friendship to consider the other in a sexual or romantic way. Men are more likely to stick it out and try and get into her pants and/or heart. Most women do it unconsciously, they like the person so much they don't want risk losing the friendship. They would also say they don't want to lose the friend as an attempt to soften the rejection.
James: "Hey I really like you, so do you want to go see a movie or something."
Mary: "I would really like that, except you're such a good friend that I can't think of you like that."
James: 'Inside of his head' "Damn, not the friend zone."