Kee, Obviously your h is very confused. But this is not the first time his confusion has been so destructive. This is not a sudden crisis for him. It IS a pattern of living. As you say, you can't change him, so you have to change your response. So far you've always been available to him to return to...and eventually he does return, only to leave again.
You have the answer in you already. It's not easy but it is also Not complicated. God (& I think your mom) will see you through this, as you make a new life in a supportive place. You seem to think by moving, you'd be ending the relationship's chance of success. I doubt that. I think the opposite and besides, if this man, who has behaved so poorly, ever deserves you, it would be by joining you where you are & proving it. Not by having you remain there, in such pain, and repeating the same response you've given before, which has NOT worked for you.
Even if your h were to really change, why should you have to remain whre you have so little support? If he changes and IF you wanted him back, why couldn't that happen where you then live? There's no reason for you to stay where you are, literally and maritally. It's just too destructive. Plus, you deserve to grieve somewhere a support system exists for you. He is the opposite of a support system. You have choice here...exercise it. Life is short and you surely know that now. Good luck-sending you prayers
M: 57 H: 60 M: 35 yrs S30,D28,D19 H off to Alaska 2006 Recon 7/07- 8/08 *2016* X = "ALASKA 2.0" GROUND HOG DAY I File D 10/16 OW DIV 2/26/2018 X marries OW 5/2016