Cinderellaman - OK, when immediate things are going wrong and our lives are out of kilter we cope less well with the emergencies. Your dog has a problem - this isn't actually your h's fault, and if he was in the military or worked abroad, you would have to cope.
You feel sorry for him, and you are expecting him to respond as he would have done. That person doesn't exist at present, and until you get that into your head, you are going to be constantly upset. Your old h would have mentioned Saturday. the alien doesn't want to think about it because it sets up conflict, so he will bury it. Until your h sees that you are happy, coping, and enjoying your life he will not want to come home. It is when they suspect they might be missing out big-time that some of the cogs in their poor disordered brains start to whirr and click a bit.
Cinderellaman - there is nothing you can do at present. Please accept this, accept that your old h is on sabbbatical, replaced by an unpleasant alien facsimile who occasionally is able to access your h'e memory circuits. The only person you are hurting right now is yourself. I am only able to write this because I have been there, and felt the pain. But it gets better. I am not unsympathetic. We have to live through the pain to get to the other side, but we have tohelp ourselves as well. Lean on us, and your firends, live each day at a time, and one day you will be on the other side, with or without your h [and I hope with], but OK.