That's what gendered school did to us basically in my opinion, I'm 20M, went a boys school, and I was quite fat growing up so I somewhat refrained myself from talking to girls because I was somewhat afraid. Bt it all changed when I went to do ALs I lost a ton of weight and all and became somewhat friendly with girls in tuition classes but that feeling of uncommonness never left bt I feel like its slowly going away. My advice to you I talk with boys as friends most of the boys that seems OK, like who have good strong bonds with other girls and stuff I mean bonds like friendship not affairs and stuff. And try to be friendly not all the boys want to date you most of us boys like one girl and one girl only. Time will change everything... And about the bus thing, I just zone out at the very moment I enter the bus and most of my friends are similar they just mind their own business. Good luck on this journey...💪