I know not everyone necessarily feels lonely. But if you do, how do you handle it?
For most of my adult life I have had a long-term partner (I've had two) and now that I don't, I find it very hard to spend most of my time alone (about 95%+ of the time, since I can't work and also can't get out much because of a chronic illness). I call my sister and my very few friends when I can (meaning I can't just call them constantly), and sometimes email them, but talking on the phone for maybe an hour or two a day, and not at all on some days, and exchanging some emails, still feels very lonely to me. I have a friend who lives near me so I see him in person, maybe once or sometimes twice a week, for maybe a few hours, and he sends me a message every day. So all in all I'm not really doing too badly. I do have a small number of people in my life and they care about me.
But it still leaves the 95% of the time when I am alone. I also have a sleep disorder and I am awake most of the night, so the option of just going outside and seeing people during the day, even if I don't talk to them, is not an option I have often. It actually helps a little even just to see strangers walking around, which is kind of... sad?
I watch a lot of streaming TV, mostly detective dramas. But they only help if they are absorbing enough that you get pulled into the story and kind of forget yourself in the process. I always have to have something on at home in which someone is talking or it feels so sad and quiet. Music is too emotional and it makes me sad and overwhelmed.
Because of my chronic illness, the option of joining something, like a church or an activist group, or taking a class, is nearly impossible, because I would just not be well enough to go.