SUPER MAD AND DEPRESSED

last year i lost my virginity to my childhood best friend and like the only reason i even let him take my virginity was because i was scared that someone else would leave me or never be my friend again and also the pain but right after he started dating this girl with big chest and butt and i blocked him instantly and im really flat everywhere and now im really still depressed about it i wanna know how to get over it because its giving me really bad body issues and ik im writing alot but im really sad and cry all the time about it and i hate seeing them in the halls it makes me wanna cry please someone help me get over it im super depressed:(. LIKE I REALLY WANNA BEAT HER UP AND HIM BECAUSE HE KNOWS HE BROKE MY HEART AND DOSENT EVEN CARE