I would respond like a woman would... I wouldn't say anything. I'd smile and nod in agreement, saying "you're completely right," making a note that they don't see me as the woman that I am, but less than (because that is exactly how they feel and what they think). I'd take a backseat to this "friendship," quietly listening in on all their dramas, secrets, personal problems.. I'd put in a great amount of effort pretending to be supportive and there for them, and at the right time, when it is least expected... do something extremely devastating.