Are you in AA? This was not clear from your post.
The big book of AA promises us "we will not regret the past nor shut the door on it". IMHO, this comes as a result of working the 12 steps of AA, particularly steps 4 thru 9
4. Made a searching and fearless moral inventory of ourselves.
5. Admitted to God, to ourselves and to another human being the exact nature of our wrongs.
6. Were entirely ready to have God remove all these defects of character.
7. Humbly asked Him to remove our shortcomings.
8. Made a list of all persons we had harmed, and became willing to make amends to them all.
9. Made direct amends to such people wherever possible, except when to do so would injure them or others.
This is the way to do it, IMHO.
All quotes from the 1st edition on the big book of alcoholics anonymous