Hey SO, dont let Mach rattle you, he's really a pussycat (but he wouldnt want that to get around) LOL! He is just trying to get you to think about things.
When you set a boundary, you have to be ready to back it up or your h is going to continue to skip across it as he has been.
I have often said, dbing is about having the best chance to be the person we want to be and to have the life we want to have.
So, you have to look inside yourself and figure out the changes you want to make and then work towards them.
You should not worry about whether giving false hope or pulling way back is going to force your h away from his children.
You need to live your life, be the best mom you could be, GAL, and continue to change and grow. His stuff is his stuff. I know that you are worried about his involvement with your children, and believe me, I understand it completely. But you cannot choose actions based on what you think his reactions will be.
I often go back to the basic db rules.
Dont go down cheeseless tunnels. When in doubt about a course of action, go back to a beginners mind. Re-assess and change your actions accordingly. Know what you want and be clear about it. Keep a positive mental attitude.
I really think you need to stop the texting and calling between you unless it has to do with the childrenn otherwise you continue to feed into his nonsense.