Surrender.
Simple as that.
Accepting what it was and what it is.
If what it is is different than what it was you can probably move on, today, not yesterday.
It will come up sometimes, but is the past, a scar you chose to bear.
Unfortunately the wound is deep so the memories will be painful but they are just that, memories of a harsh trauma.
The crossroad is also simple, though brutal:
- You can forget and leave the pain behind, but you need to say goodbye to your husband for the rest of the life. Complete healing, a new life.
- Live in the present, with the new you, your new husband, and file the past under memories. It was a terrible past, it might be a decent future, but what is important is the present, live it to its fullest.
Unfortunately is the tradeoff, you have been betrayed, that is not a "mistake" it was a very damaging choice.
Hard things like this live in the memory forever, it does not preclude to you happiness if you choose so.
Follow your feeling, if it keeps coming up and you can't live with it, the path is separate from the person who hurt you.
You love him, he seems to finally love you. That might overcome the old wounds.
Feel it, only you can find the answer