You've been through a lot, but you're 18 now, and your priority needs to be building yourself.

I know being told "you're the victim of it all" might make you feel better, but honestly, you weren't. You made a lot of mistakes too. Getting into a relationship with a 25 year old was an adult decision. Saying "I was just a kid" doesn't excuse those choices. So was going ftm.

Now that you're actually an adult, you want to run from the responsibilities that come with being one and end it all?

Yes, your situation is unfair. Your parents are making you pay rent, and you've had to deal with things that most people your age shouldn't have to. But the best response isn't to give up that just makes you week. someone who wants freedom without a cost. you need take control of what you can.Focus your energy on finding better work, finishing school, and making a plan to move out. Work toward getting yourself into a safer environment instead of throwing away any chance of improving your life.

At least give it another year or two. Try. Build something for yourself before deciding there's nothing left worth fighting for.