Accepting that you are not a perfect person and that you have leaned from the event. After all that is the truth. I have real event ocd and through ERP I am able to say to my ocd yes, not my shining moment but I am human and that experience is part of my learning and making me the person I am today and I like who I am today.
I have several OCD themes that are based on real events. You deal with them no differently than you would any other OCD thought. Have you gotten training in ERP?