After 15 years of a divorce that I wanted, and even being in a good relationship now for 7 years... I will still wax nostalgic over the 'good times' that we had.
For me...it helps to reframe.... and appreciate the gift of the relationship .... to my life, and to others. It's part of who I am, has helped mold me, given me new skills, and two children, countless other family and friends I would never have had before.
Those times now...still happen, but they feel much better.
sg Love is PATIENT, love is KIND, LOVE never fails / DB since 2001