I imagine that your friend doesn't think he could pay the $5000 back to you. He probably doesn't want to feel like a mooch. I think a better way of approachin

I imagine that your friend doesn't think he could pay the $5000 back to you. He probably doesn't want to feel like a mooch. I think a better way of approaching it would be to say that you weren't going to just give him money, but that you wanted to partner with him on it. You'll be the money guy, he can be the idea guy.