Yes that's correct, I'm a British national, I was a permanent resident alien in the US, I closed down my life there and unfortunately even if I were able to fly back to the US, I would be in an identical situation -- I gave up my rented apartment, my work, my car over there. All my belongings and cat would have to stay here, I'm broke, can't fly anything back with me. I would be sleeping on a friend's couch and having to rebuild all the same things as I'm having to rebuild here, hence the only sensible thing is to remain here where I am from anyway.
But my own family here will not be helping -- both my parents passed away during the time I was in the States, and we siblings are estranged (horrible fallings-out following the parents' deaths; we were one of those families....)
My nearest sister, who happens to have a three story house eight miles from here, with spare rooms, hasn't spoken in twenty years and indeed hung up the phone on me when I called her in desperation on Saturday morning.