Gee, I can relate to how you feel!
I'd be too scared to jump off a cliff tho.

yeah same,

Killing yourself is a very noble and selfless act, we are all going to die anyway you might as well go out your own way, I recommmend that you shoot yourself in the mouth, quick and painless. Then again jumping in front of traffic is a good idea as well. But a non-scary way to kill yourself is take a massive overdose of heroin, you will feel the greatest rush you could ever expereince in life, like an orgasm multiplied by a thousand, then you would just fall alseep and stop breathing forever, Good luck, I salute you.

If you cant find a supply of heroin to OD on, carbon monoxide works well also, jerry rig a garden hose to the tailpipe of your parents vehicle (duct tape works, make sure there is no leaks) then simply make the hose stick slightly inside the window of the drivers side of the car, roll the window up enough so the hose can just fit throught, then ductape the rest of the crack in the window so it is airtight, enter through the passenger side, lock all the doors, start the vehichle and just sit back and relax, eventually the carbon monoxide and carbon dioxide levels in the air are at such a point that they enter your body and you brain basically starves from lack of oxygen and you slip into a coma and die.