As someone who has messed up more than anyone I know, here’s the one thing I’ve learned about dealing with the past.

You cannot erase the past. You can only replace it.

We have this obsession with pondering our past and feeling regret as though doing so might bring relief or closure or what not. It never does, does it? The only way to overcome a painful past is to create a soothing present. Live now, not then. The fact that this thread exists is proof enough that you regret your mistake and have learned from it. Let it go at that. Focus on yourself, focus on now.

Make today as good as possible and tomorrow will take care of itself.