Gima is correct. She is definitely hurting. And he is right, there is nothing you can do to fix it. It is all her. Your grandmas place seems to be a great place to go to get away. Decluttering can be helpful for your mind.
I would also suggest getting out with people. For me it was difficult for me to find people I was comfortable to talk with, especially before my W moved out. I didn't want people to know about our problems, in case things changed. However, I still went out and got around people. Festivals, church, bars, coffee shops, live bands, gym, ballgames all work for me. If you can go with friends that is better, but even if you go alone it will be helpful. Find something that you will enjoy doing. You will likely need to force yourself to go (you won't feel like going), but you will feel better after you get there.
