I am also feeling this. My daughter has been living with me but she is not here that much and moving out soon. I am absolutely dreading living by myself. I know lots of people who love living alone and I wish I did, too. One thing that helps me is to have something on my calendar every day/night... a walk with a friend, or an online meeting (there are meetings for codependency on In the Rooms.com), or socially distanced chat or SOMETHING.