Please try not to give up. I was so close to death last Christmas. I was very tired with life too, just tired of the constant pain. I remember my consciousness fading away as they were trying to work on getting me breathing again, and I just remember not being scared, just relieved I didn't have to carry on fighting this constant battle.
Flash forward a few months to now. I'm far from content in life, but Im happy im here.. I still struggle and get down, I still have a **** load of problems. But I do have reasons to smile and things which make all the ****ty stuff worth putting up with.
The promise of a better tomorrow might seem like a crappy reason to carry on, after all.. that's what keeps most of us going in the first place till we get to this point we want to give up, so that must sound very hollow to you right now, but as long as we keep enduring things can change.