No one can say they grew up in a sterile room, never failing or making mistakes. Life is an ongoing process of trial and error.
I know everyone has their stories of pain and sadness or things that they don't want to bring up, but if you can't be a good friend without telling that, then I don't need any friends at all! Life is like a tube of toothpaste. When you've used all the toothpaste down the last squeeze, that's when you've really lived. Live with all your might. And struggle as long as you have life.