i know what he means, that's the same with me, it's all about the way they perceive you, you surely did something or said something that showed some weak points in your personality, even the way you react to some of their questions or the way your male friends treat you may be the cause they don't give you any attention.
My humble opinion is that they lost respect for you and dont integrate you in their group like the other guys. i say **** those girls and start creating a strong personality and a good rapport so that other girls (not these ones ) perceive you as a man with charisma, strenght, and respect you.