F- Relationship

A friendship in which two people behave as being in an F+ (Friendship+) relationship, but without sexual interaction. In an F- (Friendship-) relationship, the (covered or open) sexual attraction is exclusively one-sided, but knowingly only for one of the two people involved.

Anna: "Joe, it is weird. Yesterday, he laid on my stomach again for some reason. I don't know what he wants from me."
Maria: "Hm, you two seemed to me like you are in a relationship. So he is not even your F+?"
Anna: "You thought Joe is my F+? Never! He is really not my type, but such a good friend."
Maria: "Ah, sounds like an F- relationship to me. Poor Joe."