My abandonment issues from my childhood have been triggered.
I am glad you realize this. I am not a therapist, but I have read enough to tell you to learn to be comfortable alone. This whole process is to help you address and resolve childhood issues that got you into this mess in the first place. Same with your spouse. She has her own issues to deal with. You are the lucky on that has a whole group of people supporting you and guiding you down a better path. You spouse is not so lucky. Sometime in the future, she may come back to you and you can guide her as well. That is why you need to be extremely patient and find your internal happiness alone.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712