Why does it feel like I can never have enough space / privacy?

I notice that I'm constantly trying to escape people. I always want to be alone. And even after spendings days alone in my room, that's still not enough. The entire notion of having next door neighbors and people nearby ruins my idea of solitude. I want total and complete privacy.

Generally speaking, I'm a very lonely person. Aside from my parents, I don't interact with people that often, unless it's someone at work. And honestly, I do feel lonely; and yet I want to avoid people at the same time. It's like I can't win, socially speaking. My desire to be alone and isolated is so weird.

Why am I like this?