Ask HN: My Cofounder has decided to pursue another venture

I'm presenting to angel investors in 2 weeks and my cofounder decided to head across the street to a venture that just got funded. He's got kids, and isn't exactly the visionary type, and so the security of VC being involved was enough to soothe his anxiety. I adored working with him and thought we were going to conquer the world together, but it seems that his short term financial concerns were deeper than I thought.

We're close enough on our prototype that I think I can finish it on my own, but what the heck do I tell these angels? They are expecting two guys.

As hurt as I am that he totally ditched me in my moment of need, I have absolutely no hard feelings towards him. I want him to be successful.

I keep reading Paul Graham's note about what he looks for and I have read about what others are looking for. It's always the founding team. I'm not McGyver or Rambo, and don't present myself that way. I am terrified that if I reschedule these meetings that 1) they won't have another one or 2) they'll see it as a major red flag and lose interest in the deal.

Please comrades, help me think about how to handle this.