I still feel somewhat detached, but there's also some anger creeping in. F--- him. The rejection has gone on for years and I'm sick of being treated like someone who is not worthy of love and respect. I'm going to have to watch myself because the anger will make it harder to stick to my DB behaviour code. I still want to do that because it's a dignity thing and for the future of coparenting together.
Yes, yes, and yes. If you do the math on how long it's been that he's been at least distant and rejecting, you are bound to get even angrier. It's good to ask yourself whether your odd are great of returning to an R in which he acts like that. Do you really want a year of hard R work, then back to the same-old? Think carefully about whether you think H is capable, ready, and willing even if he does show interest.
You said there were already some years like this at the beginning of your R, so I think whether this is just in his personality really bears considering at this point.