Your H is stuck in MLC land and in his tunnel. It is all about him not anyone else. That's what makes it difficult for spouces waiting for the outcome.
Being selfish, lying and being deceitful are all part of the course. He may have hours or days when he is more rational. He is more likely to walk his path without giving you a thought.
Only you can decide whether you wish to stand. It's early days yet. No one knows how it will go. Men who come back will be different as will you and your marriage. It will be better as you will both have been on a journey of self discovery.
If your IC understands about MLC he should know about the symptoms. Read all you can about it. Knowledge is power. When you have the knowledge then you will be able to make a decision about whether you wait and how long.