If you really want to do a startup then get used to the rejection thing. Even if you get into YC you will probably have to get funding afterwards. To do so you'll need to make the case that you are building a company that will eventually be valued at ~$100 Million. It's very rare that you'll be able to do that on the first shot. Or even on the 5th shot. I know a company that got rejected 45 times before getting funded. And many more get rejected 10 times. So shake it off. It's not going to be the last time it happens. And some VC's / angels aren't as nice as PG. They will twist the knife after the fatal wound.