The easiest way to get past a perceived error is to embrace it and come at it from a different direction. Do not waste time stewing about it, reinforcing a negative mind set. HUG that event, and move on it with a positive attitude, break it down and transform it.
Being vulnerable is a scary thing. Opening oneself up to further damage is very intimidating. However, this is opportunity for inner strength to be built, as well as opportunity for another to either participate in rectification, or further damage. Either way, karma works and will increase ten-fold, for all parties.