I like the idea of a diary/journal. It allows you to pour all your thoughts and concerns and critisms into something and not worry about getting a smart-ass reply back. And once you're done there, you're always welcome to pour the rest of it here! To help in the way of the pouring-thoughts-into-the-diary buisness, try reciting the main thoughts you just put in. Usually helps releive the stress in my life (kinda like repeating a question to get it etched into your head a bit better).
For a bit of stupid spiritual guidance, take my answer to the meaning of life: The meaning of life is to enjoy it. If you're not enjoying it, you're not living, but remember that it is NEVER too late to start!
Maybe you could find something to get obsessed with, such as this website. Like drawing? Draw anything you feel like drawing. Suck at drawing? Do it anyway, I sucked when I started! Anyway, try and find something you like doing, even if you suck at it. If you keep enjoying it despite the fact you're not too good, then you're on the right track.
Sorry, I'm not the best person to talk to on the subject of suicide, but I always try and help out those in need!
_________________
I was sad when I found that she left
But then I found
That I could speak to her,
In a way
And sadness turned to comfort
We all go there