I am sad when I read something like this because I am a father who lost my son to suicide. The pain that it has left behind for me is unbearable. Sometimes parents don't show how they feel about their children until it is too late. That was not my case, I think I always did good things for my boy, but he was tormented by something that we all can never understand. In your situation, it seems you might have alternatives. Moving out onto your own sounds like it could be a solution. Unfortunately, change in life never happens fast and it will take you some time and some planning. If you can plan to save money for something tragic, you can plan to save money for something that is the real solution for you (moving out). I don't know your situation and so I cannot really comment on specifics, but can you pursue a job that could maybe get you into a situation that would allow you to move on for your own? Perhaps you can go in with some friends as roommates. There are often respite centers and similar situations where you can possibly get short or long term housing to give you a break from your home situation.
Believe me, because I am living proof... We are all always faced with many challenges and one day we can be at the very bottom and the next, we are on our way to mend. I have seen many ups and downs and I do understand how you might feel, but feelings are only temporary. Life changes and if you take away the time to achieve that change, then change can not take place. If there is even one person in your life that you know who is a friend or relative that cares about you, you have to consider what your actions could do to them. I know that I live in devastation, and my situation cannot be changed - but despite this, I won't give up. Consider it a battle that you have to win. Don't give up, ever.
This is my first post on this website and yours is the first post message thread I have read. I hope you don't mind that I care about what you've said and I hope that you will find some wisdom in the things that I have said. If a total stranger like myself, and others on this site, can reach out with words to care and help... then surely there is hope to consider. Call a crisis hotline. Get some advice. It's anonymous so there is no harm in trying. Perhaps they can suggest something in your area that could work as a solution for you.