How to handle being new at school ?

In September, i am going to a new school and although it is pretty small, i am terrified. I already know some ppl bcs of facebook but i never actually talked to them but we do like eachothers pics and stuff, also i know 2 guys there already as if they were my brothers but i don't want to only hang ut with guys so it's really weird and also im extremely shy. IM TERRIFIED ! plz help. Sometimes when i think about it i literally want to cry :( and i almost forgot to mention, i have this guy on facebook who goes there and hes in my grade. and he inboxed saying " you may think im weird but your good looking" with a blushing face and im like aw thanks lmao :) and hes kind of hot. so is he gonna hit on me because i'll even more shy and nervous to go to a new school.