Yeah, the not phoning/texting really bugs me. H going for a long weekend and as usual he won't text. Last time this happened, I asked him to leave as soon as he got back and then we both went into a panic. He's still here.
It doesn't hack it if I say I want to know he's safe. I say something about emergencies now as we both have elderly parents.
Like you, I would take him back like a shot, but it's not going to happen. I think even if his new life didn't work out he'd be too proud to come back.
The nights are really bad for me when he's away. I don't really sleep. I have one eye open and one ear open until i hear the sound of his key in the door. What a terrible way to live.