My lowest point was when I was 13. My parents had been divorced for a few years because my dad couldn't stop beating the shit out of everyone. My mom started dating again. After everything my dad had done to us, and knowing how much I had to beg my mom to leave him, I was mentally unable to deal with the thought of another guy doing the same shit to me; so I wanted to leave.
Since OP didn't post this as serious, I'm going to just throw it out there that there wasn't any sexual abuse. It was purely physical attacks, humiliation, degradation, and mind games.
My mom started dating again and wanted to move in with the guy she was dating, and the thought of another guy doing the same or worse than my dad did, fucking scared me to death. During that time, my dad convinced me he was a changed man, so I moved in with him thinking that was the safer bet. I stopped talking to my mom for over a year because I was so pissed that she'd risk moving in with a guy, when there's no guarantees that they won't end up beating you.
It took a few months to realize my dad didn't change. It took almost another year to get out of that situation. I spent most of my time in fear when he was home and awake. When he was asleep, all I thought about was how best to kill him or myself to make all of it stop. One time it got so bad, that I knew I needed to see a doctor. My arm hung to my side, was swollen like I couldn't believe, and hurt to do anything with. Everything else hurt as well, and I was limping because my leg got fucked up.
Anyway, I picked up the phone the next day after I woke up and realize that my body hadn't healed one bit, and I called my grandparents to get my mom's number.
I just said mom, I need help. I told her where to meet me, foolishly grabbed a knife in case he caught me, and limped to a field I used to hang out at that was a couple miles away from the house.
You know, I can't really tell you how I coped. I just asked for help, kept breathing, and did things I knew I had to do, even though they scared the shit out of me.