Hey,
one sure thing is that you will feel much better sometime. Because your family problems will be resolved, because you will be away from them, or because you won't care about it anymore. It might be soon, and this day you won't regret that you did not try to hurt yourself and fuck everything up. A lot of people think killing themselves when they are young, but surely they don't regret that they did not do it.
Until then, remember that your family is not everything in your life. Try getting closer to your friends, try to be more often away from home. I'm not saying you should literally run away from your family, but you certainly want to get some fresh air and support from outside.
Anyways, later you might remember all the shit you went through so that your own children and family won't suffer like you did.
(I hope that I correctly transcribed my thoughts, sometimes english betrays me)