Try throwing away some of the stuff you have in your home that's there in expectation of other people being around (more people than there ever actually are).
The key one being kitchenware I find - plates, cutlery, glasses, mugs, etc. - we usually have enough for like 6 people, if not more. I think it subconsciously makes us feel lonely having stuff around that isn't used very often or at all. Same for clothes, furniture, everything really.