So you failed. Dont obsess about it. Tell your family the company is not working. Dont try an be a hero. Be honest, they appreciate that more (fuck them if the dont). Entrepreneurs have to meet these weird social standards that are never within reach. You think Warren Buffett has ever getting a break? He gets shit every day from deals gone sour.
But keep your head up. Failure is not you. You are a person, and you did pretty good. Your investor lost the money the minute he decided to play investor. Doesnt have to do anything with you.
If you want to talk about it with someone who fails hard every month, just send me an email (on profile). I wont make this public.
Also, dont be ashamed. You got to the NBA, but you were not Michael Jordan. Who cares? I bet you played a good game, and got some good stories from it. Best wishes!