Show me an adult who has yet to make a mistake and I will show you a liar.
We've all made mistakes, we can't do anything to change that - all we can do is apologise, learn from it and move on. Dwelling on the past won't change a thing, all you can do is to use it to try and make a better future.
If I had never made a mistake I would never have learnt so much as I have. So I shall go on making mistakes, I shall go on learning and growing from them. My mistakes have shaped who I have become and I wouldn't change that for all the tea in China!