friendship advice

hayley • it's hard to be lesbian in a straight world
let me preface with, i'm still in school & on this app. i'm not sexually active & never have been either, i know this app is mainly about sex but i need a good period tracker and some support & everything. also, i don't have any friends in this school, like zero. i sit alone at lunch everyday and stuff. it's sad i know. 
so i'm having issues with friends and i don't know what to do. i've had this one friend, we'll call her A, since forever. we were so close but then we just stopped talking after experimenting with each other (long story short we made out), things were awkward. i'm gay and she's not. but i wanted to reconnect & become friends again, nothing more. but things are awkward, it's like we have nothing to talk about. how do i get to be close friends with her again? we were so close that my mom saw her as a second daughter, my brother talks about how much he misses her. but now it's like we aren't friends at all & it sucks.