You need to fail at something a number of times, before it can stop affecting you. How many times might you have to fail? Once, twice, ten times, twenty times?
Just get the ‘failures’ out the way, and you’ll begin to doubt what all the fuss was about. The real fun comes when you look forward to failing. At this point you stop seeing it as failure altogether. It’s a learning experience, which you expect to have, before you begin to experience success.