"Yes, I probably should have actually talked to him about it but.."
Why??? Is he telling you his innermost thoughts? His plans? His desires? Why he keeps being weird about the mortgage payment??
You are doing fine. You are finally not more into the R than he is.
" for now, it just feels good to be doing things for me, feel like I know what the heck is going on, and maybe make HIM wonder what's going on for a change."