Dream Of Family Cottage Disappearance

I was at my family's cottage, which has since been sold to a new family. This is a cottage that is beautiful, big, and I was always so proud of it. My grandpa built it and before that he had bought the land and he and my family would go there camping in a trailer. Then eventually they built the cottage, in the 80s or something. It was always in my life, I have so many memories of the cottage and of being there with my grandparents, bringing friends out, swimming, paddleboarding, canoeing, everything. It was incredible. In this dream, it was just a normal family holiday with everyone there. Even my grandpa. Someone was able to find the cottage on a rental website and we rented it for a family holiday. When we told them our last name and that my Grandpa built the cottage, they rented it to us for either free or a major discount. My grandpa was younger, he looked how he did when I was in my early teens. Still an older man/senior, but well and fit enough to still be active. I had my dogs and Cory there and was so happy to have them experience a family event at the cottage. It was fall and the leaves were beautiful. We went on a family walk to blueberry mountain. It was all so serene and lovely. It felt safe and happy. I don't remember there being any drama or fighting. My grandma was also younger and she was making food and it was so good. I remember smelling pie and joking with my aunt and Grampa about getting a bigger slice than them. We had a fire at night and we were all having wine, which was interesting because my grandparents don't drink. The next morning when I woke up, I was there alone, in one of the small bedrooms. It was a disaster and felt chaotic. I went downstairs thinking I had overslept, but nobody was there. No sign of anyone there. When I went down the stairs, I noticed things looked different. It was rundown and trashy looking. I thought maybe that was the new owners style, but then I realized that it was all falling apart. I ran to the basement and started digging through boxes that were my families and for some reason were still at the cottage, despite it now being owned by someone else. I was pulling out different things from the boxes. Tackle, a shirt, pictures, letters. It was random stuff but the box never ended. I went out of the sliding glass door in the basement, which is under the main level wrap around deck. I could hear people walking on the deck, so I ran around up the hill to get up to the deck. And there was nobody there. I went back down to the basement under the deck and again, could hear people. It was my family. I could hear my dogs even. I was shouting for them below, trying to tap the ceiling for me/floor for them and tell them I was there. They couldn't hear me, I wasn't there for them. I went from a full family moment with everyone there, no fighting, happy, healthy, in a space that was so special to our family. To suddenly being excluded from the family, in some strange way where they couldn't see or hear me, but I couldn't see them either. We were in different realities or something. And the house was falling apart. It was gloomy and stressful feeling because the place just was crumbling around me.