Where's the rule book for love

A teen girl finds her self at a new school, has never really had a true best friend, and has a load of anger issues. But that all changes when she thinks she meets the one and has a million new friends. She has never been this happy before until her favorite person in the world gets sick, her little sister Amy is the only one who understood her and mixed up in all this drama her first best friend atempts to steel her man. Will her anger issues take over when she snaps endangering the life of friendemy?