Its been very difficult for me to separate detachment/attachment from giving up/hope but I am working on it.
I am having trouble distinguishing between detachment and giving up, as well. But i think that if I focus on "me" and stop worrying/wondering about him, the OP, his/their whereabouts, I take the focus off him and save than energy for me. This will most likely take pressure off him. So basically, by detaching, I believe there's hope they come around..
Either way, keep it up and in then end, you know at least you'll come out a winner!
Me: 36 H: 36 No kids EA/PA confirmed: 02-Jan-2014 Separate bedrooms/still living together