TEENS WHAT SHOULD I EXPECT FROM THIS SITUATION?? HELP A NERD?

umm wow. thats complicated. my advice is to just go with the flow. don't stress over it or make stupid plans to get her to talk to you. you could talk to her sister on the bus and just be like hey i know your sister! tell her i said hi. or you could friend request her on facebook. and the little brother thing? if her little brother is younger than like 11 then it means she probs talks about you a lot and if he's older then he was trying to embarr her.