Thank you for your welcoming post. I have been lurking here for quite some time and I find it very helpful and supportive.
Yes, we have a DB coach and have done a variety of counselling over the past 6 months. All of it very positive.
As you can appreciate, those sessions would not be an appropriate place for me to work through my feeling surrounding the OW. I also feel ashamed and guilty so I carry those feelings quietly. But nevertheless the feelings are quite intense...I've used the same language you recognized about addiction for a very long time. I've heard heroin addicts say how much they loved the high...and the only reason they quit was the collateral damage.