I read your last posts, and will check out more later on, but I wanted to respond to you as soon as possible.
When I had cancer my doctor did not tell me to eat well and exercise...he told me to reduce my stress, enjoy my life, connect with others.
Nurture your friendship with your STBX. Do your best to DB in that situation, but it's better not to be so alone and isolated. We were broken up when I found out and we survived it....even thrived after....our relationship is great now....and I took your same stand. But...I didn't have OW in the way. That makes things take longer. You don't need the stress.
I'm glad you have some outside friendships. But don't play your hand when you're DBing EVEN IF he puts the pressure on.
I'm adding you to my prayer today. Have a very beautiful day.
Trust yourself. BE KIND to yourself.
sg Love is PATIENT, love is KIND, LOVE never fails / DB since 2001