> If you go to mixed classes, like me, then there are a lot of girls, which have zero interest in you (but have some "older" boyfriend) and constantly are turned off by you and look down on you.

This is because in a lot of western countries we still have a strong culture of differiencing the way boys and girls are educated. For example, they are seperated from preschool, and expected to play with different toys. Experiments in "gender neutral" preschools show kids tends to play more with kids from the other gender compared to other preschools.[0]

[0] https://www.sciencedirect.com/science/article/abs/pii/S00220...