once you get to know yourself better internally, you'll realize there are parts of yourself you can't access when you're out in the world, and you'll look forward to having your own company to visit them. it also helps yes, to do things and have hobbies, but also just going new places alone. people don't talk about this enough but depression and loneliness can very much be tied to a place, and if the only time you're alone is when you're in your room, you'll probably associate it with feeling sad and stuck. keep up a whimsical spirit and go exploring alone and think of things you never would in the company of others. make it special and you'll start to look forward to it.