I have fucked up. One of my DC is and was very hard work- numerous health issues, got worse in the pandemic. I have spent way too much time focusing on my DC and not enough on DH, or so he says. I made sporadic attempts to reconnect with DH over the years, but there was always some DC crisis, so it fizzled out.
I have now emerged from the teen years drama, finally able to focus on other things, but DH is now disconnected and says he can't just turn on the switch to reconnect again. If I could do it over again, I would have let the DC sort themselves out.
I think we are both at fault, but mostly me. He doesn't want to go to counselling. He just wants space, which means sitting in his room all day working and speaking very little.