Kirk, I think what you say here about "that woman who did everything for everybody" is really important. Hush said on here a few days ago, when we were talking about ironing, that she had done everything for everyone. Hush, you've also shared with us that you are a military wife, and from others I know what that can mean in terms of the impact on you and your life. You've also shared that he left before, but came back.
All of this I think tells us, together with the 30 years, why this is so, so, hard. I think what is specially hard is that he went and came back before: we are all cheering you on to get off that sofa and reclaim your room, to pack up his stuff and put it/throw it away, but I feel in my heart that there's a large chunk of you that feels (even if rationally you don't belive it) that he may yet turn, relent, return, and that what you need to do is suffer through this pain until he does.
Well, as others have said, you don't have to move forward until you can do so. When you do, I think you can be absolutely inspired by the stories that others are sharing: they didn't think they could survive, they didn't think they could ever have a good day again, but they did, even though they passed through suffering no less acute than what you are going through now.
You don't need to move forward for us, we can just sit here with you until you are ready. Just eating, sleeping, walking, watching telly, trying to connect with others. I think of you every day. I know you can't feel it or see it, but I see tiny green shoots.
Please try to throw something of his away today. Or ask your sis to help you with the bedroom challenge. If you don't, we don't mind, we will still be here.