There are some points in someones life where they regret a mistake they made in the past. But sometimes you've got to learn from that mistake. If you don't learn then all it's going to do is just affect your road to the futre then there will always be a curve in your road. If you dwell on your mistake it's just going to keep you up at night and it also keeps you from moving on. If you move on then you will be able to forgive yourself and realize that it was a stupid mistake and you wish it wouldn't happen but it did and you just need to get over it and move on.