Iamtrash, The things we feel, the hurt comes within is not causal but existential. You are hurt, not because of his existence in your daily life, but your own heart's existence. It is the sound of your. soul's responsd to things, and to your surprise, is a healthy reaction.
However the mentality you are using to move on is called the desentisization, which is also the technique used for minimizing guilty amd shameful thoughts you had during the affair. Desentisizing yourself is not equivalent to moving on. It is more like forcing oneself to be okay with things.
There's one way to cope with all this. The first one is thinking this pain as a interconnectivity you have with your stbxh. Cherish that. You are too much emotional focused and used to pushing it all out in the open to be understood. But somethings are meant to be kept to oneself.
Cherishing interconnectivity is a way to cope with things. Just lay down when these feelings of negativity came. And tell yourself, "this is the same feeling he is feeling now". This is a method, a way, I think could help one to realize their stance. During that time pain multiplies, but the unfairness and feeling of weirdly wronged or let down will subside to help you deal with it.
Another one of the coping methods is by having your peace with things. Just laying down and playing the arguments you had, the lashing outs and fights again and again in your head, to see what you were in the position at that time and what is his position at that time. Try to think of different outcomes or create alternative interactions with these past entities.
The Couples or ex-couples have distinctive patterns of revolving around the issues of disagreement. By realizing these points, next time you can create a more healthy response by changing one aspect to see the response to it. By doing this time to time, a healthy base can be created between two individuals who have different sides. Like mediating the issue between one another by understanding the triggers.
Lastly, I would like to say I am sorry for your loss of the marriage. That is the usual the outcome of the affairs. The Reconciliation is about rebuilding and not repairing, and I guess you guys have figure it out that none of you, or one of you doesn't want to rebuild and recreate to continue. I commend to your responses, but you should go easy on moving on. The Pragmatic way of thinking and feelings never bring positive outcomes. Giving in a little wouldn't make you less of yourself.
Repenting is one of the aspects of letting go. And it seems like you haven't started that process. You can use this temporary custody issue of sharing the home as a repenting situation. In order to repent one must give in.
"I created this situation and the dilemma of our schedule problems. So by giving this, I am mending. Maybe not our marriage, but my relationship with my stbx who I should be in positive norms in order to create best outcomes for children."
These sacrifices always pays off as the other party will notice these and try ro ease up on many other things.
I hope the best for you in regards to your healing, but suppression is not equal to healing. It is just avoidance to feel good. The Healing is just like when real wounds heal, it is a hurting process of coming to terms with things slowly. The Grief and the mourning.