dude you should be pumped to finally be graduating and getting a chance to start your life.
i would go away to school, away from all the bullshit, or just take some time off to do whatever. its up to you.

as far 'hating' your life and what not, man you gotta suck it up and do something, whether it's seeking therapy or changing up your life / lifestyle.
take some actual time to think about this, and don't just resort to something as hurtful as suicide.
that is by far the worst thing you can do to your family, no matter how much you think they hate you and isolate you.
my dad recently tried committing suicide for various reasons, and it has been almost impossible to deal with, and that's with him failing in his attempt.
imagine if no one walked in on him drifting off to sleep in the garage?

but most of that rant about the school system is flawed.
in it for the money? what money?
not all schools and teachers are shit, and I've always said whatever you put into something is what you get.
you feel me?


keep ya head up bro.