It’s a consistent loop, the past. You keep replaying it over and over in your head. “If I had just done this,” or “I regret…” – those phrases mean stagnation. The past is exactly that, the past! It happened and it may take some time to recover from it, but make a promise to move forward with forgiveness and a little more wisdom.
You know what you know now for a reason. Take what you’ve learned and go live.