A famous person said that we can't change anything in the past, but we can change everything in the future. This sentence is so right, because the past is fixed and we can't change it. What we can change or master is the future.

We can change everything in the future through our own efforts. As long as you are not afraid of suffering, you will definitely change if you persist.

So now that it's over, we don't have to think about him anymore. What we need to think about is the future, not what kind of person we want to be.