Coly23 - I had / have similar concerns in my own sitch. In my case my W left asking for space and in the few contacts I had with her I told her that I was giving her the space she was asking for.
We can both just hope that they will remember that as they work through their own issues.
I do truly believe especially in my own case that pushing myself into my W's world would do more harm than good. I am confident that she knows that I am here for her if she wants to return and I would hope that your H knows the same thing. If I recall your thread correctly he was clear when he left that it was his own choice and that you didn't want him to go.
It is indeed depressing for us as the LBS to know that they are on a journey without us and that there is nothing that we can do that would not potentially backfire or perhaps worse, pull them out too early and have to go through it all over again.
Sending you a hug ....
On BD H52, W50 T27, M26 S21, D23 BD-9-Mar-16 D-15-Jan-18 Final-19-Apr-18 I am a storyteller. The story may do you no good. But a story is never for the listener. It is always for the one who tells