Why would my brother tell my stepmom? How do I get out of this?

a couple MONTHS ago i had with 2 of his friends and some ***** went and told him because i put pictures up on my facebook and when chris found out he was so mad at me.. but it happend like when school was still on and in 2 years ill be the legal age to have so god like why the f*ck does he care, everyone does it..anyways he told my stepmom who hates me because shes jealous that i get more attention from my dad so HE TOLD HER because he knows that shes jealous of me. and then that ***** told my dad i have a bad reputation in this neighborhood and chris has to go to school every day while i'm ******* all his friends and his girlfriend hates me and calls me a ****.. and etc... i'm really mad right now.. i mean yeah i know i made a mistake but i dont want to move? how do i get out of this please help me.