Take a moment and stop for a second. Please consider the consequences of killing yourself.
I don't know anything about your life at all, or the things that have caused you to want to die, but please - is there anything that will make you feel any better right now, or that will calm you down?
was this "crashing down" caused by a relationship? Please hang on - there ARE people out there that you'll be able to share a wonderful, lasting relationship with. It might sound like bullshit right now, but it's true.