A few thoughts based on my experience:
Forgiveness has to be earned. That takes thousands of trust-building, self-redeeming actions by the WS. Thousands. Think years, not months.
I brought my lack of forgiveness to an MC session about 2.5 years out from d-day. Our MC refused to discuss it - 'It's too early,' she said. That was with no blameshifting, no minimizing, no gaslighting (which stopped on d-day). That was with a WS who was changing before my eyes into a good partner.
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Don't conflate your healing with empathy for the WS. They are 2 separate things. Accept, attend to, and heal from your own pain. I think the BS's level of pain has no relation to any mitigating factors in the WS's being.
My W is a CSA survivor. Many CSA survivors do not cheat, but my W grew up vulnerable to an approach from ow. I'm very sorry about that. I put more than a little energy into supporting her healing because I loved her. But her A was devastating nonetheless.
For a while after d-day, I buried myself in grief over her CSA. My own pain just festered. Dealing with my own pain improved everything about my life, and it freed up energy that I could use for more personal healing, for supporting my W, and for healing our M.
The BS is the BS; WS is WS. They are separate people with separate needs. Put your own oxygen mask on first.
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Don't conflate what you want and what you will do. I preach starting your thinking about your relationship by finding out what the BS wants, irrespective of what the BS thinks they should want.
If you want to split, you'll save a lot of energy by starting with what you want, because you don't need anyone's permission to file for D.
If you want R, life is a lot more complicated - you have to evaluate your WS as a candidate for R. If your H is unremorseful, R will not work, and you'll have to deal with all the implications of that. Your WS may be remorseful but want to split anyway. And if your WS is remorseful and says they want to R, you have a lot of work to do with no guarantee of success.
IOW, after knowing what you want, you then have to figure out if what you want looks attainable without demanding more from you than you want to give.
But ... by starting with figuring out what you want, if you don't think you can get it, you can work for the next best outcome. I'm never going to ride my bicycle up or down a mountain, as much as I'd like to; I can still ride my heart out in less demanding terrain.
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My reco is give up trying to control the outcome, because that requires you to be able to control other people, and you just can't do that.
Make healing your goal. Process the pain of being betrayed out of your body- no matter what the betrayal was.
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The post above tells readers what to do, and I don't mean to do that. It's my best advice, and readers are free to ignore or modify it so that it makes the best sense to them.