I think you have to look at it this way: do you regret anything that you did? Did you try to work things out? Did you do everything that you could within reason?
Are you sad that your marriage ended? Sure but are you keeping that sadness on you or are you letting it go. Same with the anger and resentment. We all may have flashes of those feelings but if they are a constant in your life than you won't be able to look back and see what you gained from that relationship.
Believe me it took quite a while to feel/think this way but you can't carry the mistakes/misdeeds of others with you or you won't find the happiness that you deserve.
kat
Me-53(and learning!) S24, S21, D18, D17 Just keep swimming, Just keep swimming. Dory