Okay, for now I'll try to look over the part about you possibly ending your life. You have issues in your house but you neglected to mention what those issues were, sadly. Is there any way that things could change? Maybe there's something on your part that you're missing out on and it could be fixed simply?
I know not all households are great and each teen goes through things but some times it's just about looking a little deeper. In some cases there are ways to create a better environment and if there's any way that you could possibly do that for yourself then that would really be your best option.
If there's no way that you could help yourself then do you have other family members that live close? They don't necessarily have to live close but it would be best because then you wouldn't have to go through school changes and such. If you have an aunts, uncles, another adult in the families number then give them a call. Explain to them the situation and that you can't possibly stay there any longer. Don't give them generic reasons as to why though, you need to be completely honest. All you can do is hope that they are willing to open their home to you.
If that doesn't work then try a close friend? I know it may be awkward moving in with a friend but you're desperate right now. As you said, you need a way out and this could possibly be it.
Other than those two options you don't have much of a choice because of your age.
You need to realize that life isn't always going to go the way we want though. You can't always run away from your problems and soon enough you will have to face them. Ending your life is just a way of giving up and admitting you weren't strong enough to push through. You are strong enough, everyone is, you just have to have faith in yourself. Don't let a bad home determine your future. Your future is your own and it is what you create of it. I hope you can find a way out, good luck.