What the discussion about loneliness almost never talks about is skills that people that are lonely might lack or any mental health issues they might have. I had a very strong social anxiety 10 years ago. I never left the house. I lacked the skills to cope with that. (Therapy in that case helps.) If you're lonely because you don't know how to connect with people, that's an even easier skill to acquire (i.e. read "say…
Again, I know it does not work for everyone, but sometimes throwing yourself in the deep, away from your own comfortable home situation, works wonders.