I think the point is that right now you can't rely on him, and shouldn't rely on him. Have ZERO expectations about him.
I also think that cutting down on contact really helps with detachment. I remember staring intently at my phone in the month post BD, waiting for an email or text from my W, which back then generally came every 3 or 4 days. It was pure torture, and I think it held me back from focusing on myself. Now, I might get an email every 2-3 weeks from her, and I am never waiting for it or expecting it. It's freeing because so much less of my life revolves around her. Obviously, you have a child and need to coordinate that, but I think if you could probably cut back a lot more on the communication. Do you have a schedule or plan in place?
W 34 Me 42 Married 7 years together 8 0 kids 1 beloved dog BD 4/6/2018 I moved out 4/7/2018 I moved back in alone 8/05/2018 I file 3/06/2019 D official 5/7/2019