Bea, I do understand all the things you are feeling. My xh has been texting me here and there, more often. Your first instinct is self preservation.
And I think, with long term marriages involving children, in particular, you never really put it completely behind you because they are such a huge part of your life story.
The great thing now is that you get to decide what you want to do from a place of strength.
Mlc is very sad. That fact helps me keep a compassionate heart.