I'm new to your thread, but I think you should hang in there, if you can. If it helps at all (and forgive me if this doesnt, but I am struck by the number of people on this site who are suffering from 7 year Saturn cycles)...your H has been going through whats called his "Saturn Return", which hits at between 27 1/2 and 30. Look it up on Google for more info.
Thats what was probs going on when he first left. It causes changes and puts you through tough lessons and can be quite depressing. It tests the things in your life (like careers and relationships) to make you grow and see if these things are still serving you. Hes may still be moving through this process and believe me its no picnic. He may not even realise right now, but he probably will when he looks back on this and appreciates how hard it was for him. You are younger, so it hasnt hit you yet.
I'm no expert...(my BF just moved out today :-( !) but if you are his friend and dont pressure him, but be understanding..who knows? Saturn is like "the cross we have to bear" in other words, its like a heavy weight around us and it can feel oppressive and stressful, whether you chose more responsibility (in the case of those who marry/start a family at this age) or if you feel like life is dragging you down unwittingly. As I said, its maybe even a little depressing. Its not lighthearted or fun, its about hard lessons, working hard, trying to establish a career and facing up to responsibilities.
Maybe just try and not be another pressure, but acknowledge that he is going through effectively "growing pains"? I guess that ties in with the DB principles...I wish you luck !
