Startups fail. People fail. It’s just a fact of life. Sometimes you fail for good reasons, sometimes you fail for bad reasons. The whole point is that you want to try again.
And yes, if you try again, you may fail again. That’s part of the process too. The point here is to fail differently, hopefully in some way that let’s you get closer to succeeding. You learn by making mistakes. If you make the same mistake over and over again, you’re not learning. So, try to make only new mistakes. Avoid old mistakes. If you fail, then fail in some way that breaks new ground and lets you learn new lessons.