Dude. A lot of us have done some really crappy things in life. Myself, included. I lived on this planet for 31 years and I have done some really crappy things to people.. But i've also done some really good things for people. You can't let a single event or even a series of events bother you like that.
I'm sure you are probably young, so please heed my words when I say this, "It'll get better". Just think of that. While life can be utter crap (which it has been for me as well) it'll get better.
If you need someone to talk to, there is your family you can address your concerns to. Unless they are the problem, then you can speak to various hotlines that are usually toll-free that can help you with your problems.
Just don't do anything foolish, dude. And we'll be seeing you back on the site. If you need time off to get your life together, then do it man. But no need to end it all.