There are several ways of coping with a problem. Work on it inside and out with healing and realization (which is sometimes necessary in order to remove it from your life), see it as the unchangeable but forgivable past, accept it, and then let it go.
It’s also good to look at where you are putting your focus. Are you dwelling on something that you cannot change? The past is gone, there’s nothing you can do about it but forgive yourself from it, as we are a new person in this present moment. Will the past still linger even when we are being positive? Yeah it might, but will it dominate the mind? We make the choice of what dominates the mind.