How to face the shame in my heart more quickly?

DISPASSIONATELY: Do not confuse the need to admit mistakes with emotional responses: in life there is only room for good thoughts and everything else is strictly business: in business, you make up your mind what you are going to do do, do it, and accept the consequences: this is the definition of both maturity and bravery altho not very "touchy feely", it is the solution.

Shame: Shame is just about the darkest emotion people can face. It presupposes that there's an audience to our alleged wrongdoings, and that devastating judgement will be passed. Something to remember is that everyone has something they feel ashamed about; it's inescapable. Find a reputable psychotherapist to speak with. Getting it off one's chest in a safe, nonjudgmental place is the first step.