I used to think about killing myself, back about 6 years ago.
What kept me from doing it was that I would sit there with the bleach propped between my feet thinking "today was the worst day of my life. I hate myself, and I hate my life. but tomorrow has to be little better, cause it can't be any worse. so if tomorrow gets worse I'll get it over with." and maybe the next day would be a little better, or maybe it wouldn't.
but there was always the hope of something going right the next day.
gradually I learned that people would notice if I was gone, and people would care, and not just my family, but that I had more friends than I had thought. and I realized that I would miss even the people I smiled and nodded at in classes, or in the halls, if they dissapeared the next day.
So in other words don't do it.
People will miss you more that you can imagine