"Honestly think the only thing that keeps my health and my marriage intact is my running."
I gotta start running. That's the one thing I always get wrong.
Good luck. Just remember, this happens all the time. For you, it will be a learning experience. In a year's time, you'll be in a new situation with almost a completely new life, and your experience will be valuable to that next step.
Next time will be a little bit better. You'll be a little more trusting of yourself, with a little less naivete, and you'll create something again. Or you'll help someone else create something. Either way, your life will get better, because you're a capable person who started a company, and you're capable of even more. Do the best you can right now and stay positive. The future will be brighter.