You don't mention any children who may have left home. In my case I took over their bedrooms for my own living space and we more or less lived separate lives in the same house. It made life more bearable until I made the decision to divorce. When we sold up I kept very little, but it didn't stop me loving my new little home. All that I have from the past is a few photos and my memories. Since moving I have lost both parents and gained 6 beautiful grandchildren who are now my focus. I don't look back, only forwards.
I don't know how fit you are, but I can recommend HF walking holidays, on which there are always several single people, mainly women 'of a certain age'. They do short or longer breaks in the UK or abroad, also some for special interests. Pricey, but you don't need to spend a thing while you are there. When married I used to go away alone several times a year, but since being retired and single I don't feel the need. Life is one long glorious holiday!