Hi haunted. Just read through your postings and sending you big hugs. I am sorry you are here, but you found a great place to be. I never could have gotten where I am without the amazing people on this board.
It's important to move your focus from your H to you and your children. It's tough, took me months to do. There is no rhyme or reason for the behavior of a person going through crisis. It will not make any sense and you will be wasting your energy trying to figure it out. The main thing that stands out to me of whether or not someone is going through MLC is the way they abandon their children. No grounded, rationale person having some marriage problems does that! It is way deep and something your H needs space to figure out.
Think of it this way next time you want to text him. The only way he will be able to see his unhappiness comes from within him, is if you get out of the way and out of the picture. The more you are around, the more he will blame you. I hope that makes sense?
As for MIL, I will gladly shake her. I believe my own MIL is a huge reason for my H crisis. Please stop letting her relay messages to you for your H. That is NOT ok. Maybe even block her number instead of not responding, that way you don't even see her "messages" no good is coming from that for you, and it's time to put yourself first.
Keep posting and read all you can about MLC, it really helps.
Me 48 H 46 S 11 M 2004 BD 8/13 H moved out 2/15 -live in the present, enjoy the beauty around and within you, explore your new future-