Help me

Help me please I found out i was assaulted when i was ten or so by my older half brother. I woke up to him in my bed, and i was a child so i didnt think much of it, but i always had this rule where i didnt want anyone in my bed because it was mine and blah blah, so i told him i was gonna tell on him later and he ran back to my brother bunk bed where he originally slept and didnt say anything. I ran over to tell my parents, and in the morning yhey obviously knew something was wrong so they asked him why he was in my bed and he admitted that he been using my ass to masturbate for months. And i got memories to when i would wake up in the middle of the night where he’d be walkong back and forgh with paper tissues and my butt would feel wet and i always thiught i was just seeaty and stuff but it then clicked and i remembered all the tomes he would grind against me randomly but again i didnt think anything of it and he got beat for three days and he had to applogize to me and i saw him pleading for forgiveness cause they forced him too and i was so scared but i always thiught it wasnt that deep cause it wasnt actually rape and i was jever conscious for him doing that and now im much older now but this week has been really hard and even to this day it turns me on so much to think of me being assaulted like i hate it when i hear of of others getting hurt in that way but it arouses me so much and i thiught it made progress but during this period it turned me on so much and its terrible and i dont know what to do its still haunting me when i didnt even really go theough anyrhing and ive been telling myself that im fine for the longest time and that everything is okay but this is jsut revealing that in not okay and that im judt some sicko who gets off to other people hypothetically assaulting me whats wrong with me i dont know what to do please help me llease validate me please do something i dont like feeling like this what should i do