Sorry to hear all this suffering that took you near to the idea of killing yourself.
Just one thing: see, I am a total jerk at business. But I believe that the moneymaking ablity is overrated today. You want to kill yourself because your business failed? Well, don't do it at all, but NOT for this reason, especially.
Try to have your depression cured. Your depressive tendencies might have been the reason of your failures, even when depression was not evident.

The best of luck