Only you can say whether or not you should be hoping. Your story is very similar to mine, and many others on this board. This board is full of people who have hope, if not for now, then further down the road.
Except for the facts that I don't have a successful career and my girls are adults, you just wrote my story. My H and I did move far away from our families, as well, but just another state (might as well be another country).
The point here is, yes. You can still hope. But we are all learning that although there is a part we might have played or are playing in H's eyes that makes it so that they feel the need to leave, it most likely has been altered or enhanced in their minds due to their depression and building crisis; their MLC.
We can still DB. But understanding that they are in crisis is key. This is a long road. MLC can take a long time...however long it will take for them to work through their issues. Your best chance is to read what Cadet has given you as homework and post often. Focus on you, but be understanding of his needs to work this out on his own. Help him by giving him space, but being the person he can trust to turn to when he needs to talk. Listen It will help him. But that's about all you can do. Other than that, back off and don't pursue him or effort contact.
There are a lot of loving supportive people here...and a lot of wisdom. Keep posting!
M-51 H-54 2D-27 and 25 M-26 yrs Bombshell and IHS 7-29-15 He moved out 10-3-15 D filed 1-27-16 D final 10-27-16