Hi there Lost2026,
Welcome to SI. The statement No Contact = No New Hurts really applies here. And I know it's not easy. One of the reasons affairs are so addictive is that they are a cheap and easy way paper over crummy feelings.
Humans are wired to experience a giant range of emotions, some feel wonderful, some are kinda neutral, and some really suck to feel. When we are lonely, sad, hurt, bored, frustrated, disappointed, scared, mad, resentful, (insert any other crummy feeling here) we tend to do whatever we can to escape those feelings. Not all coping mechanisms are the same. There certainly are ways to learn to sit with difficult feelings in a way that's wholesome and not destructive, but those are skills we have to develop. It's much easier to reach for something that numbs or distracts from the crummy feelings. Affairs are just one of the many behaviors people use for that purpose. Sex, booze, gambling, drugs, food, shopping, cosmetic surgery, exercise, work, any of these can become an unwholesome coping mechanism. They can make us feel great in the moment but the price is the hurt and harm we cause ourselves and the people around us. You're going through it first hand.
Additionally when we abruptly set aside our coping mechanisms, those crummy feelings we were papering over don't just disappear; they are right there waiting for us. Add on the additional feelings that rain down when the betrayed partner discovers the truth of their situation and it can all just feel so unbearable. You want to reach for the thing that gave you respite from crummy feelings in the past, the AP.
When my D-day came I had been in an affair for 7 years. The first 4 were online, and I messaged back and forth with AP every day for that entire time. The last 3 years it turned physical after AP moved to my area, even though we swore to each other that we would be "just friends". He was the first person I wanted to talk to in the morning and the last person I thought about before I went to sleep. I was in so very deep.
On discovery of the true nature of my relationship with AP, my BS said "choose" and I really did not want to. I wanted to keep both of them in my life and thought if I could arrange a "sharing" setup that I could keep everything I wanted. Barring that, I hoped that somehow AP and I could remain friends, that I wouldn't lose the entire relationship, just the sex part. That was delusional thinking although I couldn't see it at the time. It was completely unacceptable to my BS. I actually considered leaving BS and trying to make a go of it with AP. (He was single.) I spent a week at my parents' house in another state trying to sort through my feelings, made a pro/con list, blah blah. I credit my sister with convincing me that I at least needed to give my marriage a chance for salvation. So, when I came back, I had one last meeting with AP and told him that I was going to try to salvage the marriage. I said I was going NC for 6 months and asked him if he could wait. "Obviously" he said.
I confessed everything to BS. Everything, not just the relationship with AP but other cyber encounters I had been having through an online roleplaying game that I had been spending an insane amount of time playing. I quit the game permanently. I discovered SI a few days later, read "Not Just Friends" and "How to Help Your Spouse Heal from Your Affair". I started to be able to put the affair in context, and to have a language to describe what I was feeling: ambivalent. To BS I could only commit to NC with AP for 6 months at which time I would either leave BS or send an NC letter to AP. And, I said that while I was sorry for hurting BS, I did not see my feeling for AP ever changing. Not in a million years. (They did.)
That was in June. I pined. I journaled. I took up container gardening. BS and I tried couples counseling and the counselor let me know after two sessions that I wasn't ready, that I was still aligned with AP. I started individual counseling. I read and read here on SI. In October I joined the site so I could see peoples' profile. In November I had finally progressed to the point that I could see that, regardless of the outcome of the marriage, AP was never going to be a healthy option for me. I realized that my happiness (and honestly at that point I was still worried mostly about my own future happiness) was either going to be with BS or on my own. And, while I hadn't contacted him, nor he me, all that time I had continued to focus on the relationship, keeping the memories alive. hoarding my momentos, writing to him in my journal, and scheming somehow or some way we might still be able to be together or at least friends. Prior to that day in November, I hadn't wanted to be NC with him. That day, I began to at least want to want to. It was a significant step on the path to recovery.
I learned about mental NC. I deleted his contact info. I deleted (with BS permission) the emails, the photos, the message logs. I burned the drawings and the momentos in one session while sitting in front of the wood stove with a bottle of booze, drinking and burning. I gave away a recliner that he always sat in when he came to our house. I donated the metal from a big wind chime he gave me to the art department a local college (not before BS ran over them several times with our car). I eventually was able to write an NC letter that was acceptable to BS and me both, and we sent it together. Finally, I boxed up anything that was APs personally and sent it back to him. I started actively stopping thoughts of him when they would come unbidden to my mind. Instead of dwelling on the memories I envisioned a large red STOP sign and forced my attention elsewhere. Sometimes I would envision slamming the door in AP's face or even pushing him out of an airplane door and watching as he got smaller and smaller as he fell out of sight. Then redirect my attention. Over and over.
Funny thing about brains, they aren't fixed in their wiring. We have these neural pathways that get used again and again as we repeat the habitual thinking of our every day. They're like greased rails and our first impulse is to just go right along them, especially when we're feeling overwhelmed with crummy feelings. To change them, you have to make a different choice in the moment. Again and again and again. One neuron at a time.
So I think that's where you are. You may not want to go completely NC, but you at least have gotten to the point that you want to want to. So now take the steps to support yourself in that endeavor. Delete his contact info and block his number. Change yours if you have to. Delete everything. Ditch all the momentos. Hell, make it a ritual if you have to. At my BS's request I did a cleansing ritual and I destroyed the last thing I had of his, which I had left at my parents' house on that trip right after D-day.
It's almost 16 years since for me. BS and I are reconciled. I do not feel fond memories for AP, and in fact I feel the cringe when I really think of how I behaved back then and how I threw my integrity in the toilet so that I could have the feelings I wanted in the moment. I have developed some tools for sitting with and dealing with difficult feelings in ways that are wholesome instead of destructive to me and the people around me. It took a long time. I'll say 6-8 years for reconciliation. 10 for the personal work of finding out how and why I was able to betray my BS and get my perceived needs met at his very great expense. Not sure the personal work every completely ends. And I know that seems like a long time, and it is, but you know what? That time's going to go by no matter what. The steps you take now determine what your life looks like after that time has passed.
The work is 1000% worth it. You can do it.
Proceed with conviction and valor. Best to you from a fellow EvolvingSoul.