Why was I made this way?

I don't like my height, it makes me seem older than I am, I'm 13 but I get taken as a 16 or 17-year-old. I get stared at all the time when I try to dress normally, I don't tell anyone because they blame it on what I'm doing or wearing. I hate the fact I look older because when I was 8 or 7, my no longer step-brother found me attractive and would touch me and force me to have sex with him every time we played hide and seek with the others. It continously went on, and soon enough, it wasn't during just hide and seek. Thankfully, my dad left his mom, but now? Idk, I have old men and married men WITH KIDS staring at my legs, staring at me, all of me. My smart mouth made me lose my best friend, I haven't been self-harming, I'm a year and 6 months clean. Idk why but seeing others relate makes me feel like I'm not alone <3