This girl is suppose to be my true friend, i told her i always got her back. This other girl was at our table and she is this girl's other friend. Well that girl was starting crap wit my brother so i told the principal that, that girl was cheating. Now my so called true freind is mad at me. Should i tell the gurl sorry or just let it be. A little more info i don't really have any friends besides my family.Thanks for your answers.