The Course in Miracles says over and over that forgiveness is the answer to almost everything. I know that when we are stuck, it usually means there is some more forgiving to be done. When we do not flow freely with life in the present moment, it usually means we are holding on to a past moment. It can be regret, sadness, hurt, fear, or guilt, blame, anger, resentment, and sometimes even the desire for revenge. Each one of these states comes from a space of unforgiveness, a refusal to let go and come into the present moment.
Love is always the answer to healing of any sort.
And the pathway to love is forgiveness. Forgiveness dissolves resentment. There are several ways in which I approach this. There is an old Emmet Fox exercise for dissolving resentment that always works. He recommends that you sit quietly, close your eyes, and allow your mind and body to relax.