Do not share your thoughts with him at this stage. You want him to work to get you back. Have your list of non-negotiables firmly determined. Do not share it with him. You wait for him to list out what he is willing to do. That comes after he begs you to take him back.
Here are a few of phases for you to have ready:
"I am not sure" "I need some time to think about what you said" "I will let you know when I have decided" "I think it is best if we discuss that at a different time"
Do a lot of listening and validate his feelings.
"I can see why you feel that way"
You can then come here for input from us. You will get a variety of way to respond and can take your time making decisions.
I wish you well! HUGS
"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