People conflate these two things constantly. Being alone and being lonely are not the same thing, and treating them as if they are causes a lot of confusion — both in how other people understand you and in how you understand yourself.
Being alone
Being alone is a physical state. You're in a room by yourself. There's no one immediately present. For a lot of people, especially introverts and autistic people, this is not a problem at all — it's actually necessary. Time alone is restorative. It's when the noise of other people and social demands drops away and you can actually think, work, exist at your own pace without managing anyone else's experience of you.
I spend a lot of time alone. I like it. My best work happens when I'm alone. The quiet is productive. It's not something I'm enduring — it's something I actively want.
Being lonely
Loneliness is different. It's not about physical presence — it's about connection. You can be in a room full of people and feel profoundly lonely if none of those connections feel real or meaningful. You can be physically alone and feel completely fine because you know people are there, you talk to them regularly, you feel understood by them. The physical aloneness is irrelevant to the loneliness.
Why this distinction matters
When people see someone spending a lot of time alone they often assume loneliness. They project their own relationship with solitude — which might be something they avoid — onto someone for whom it's genuinely comfortable. This leads to a lot of well-meaning but misplaced concern.
The question worth asking isn't "are you spending time alone" — it's "do you feel connected to people who matter to you." Those are different questions with potentially very different answers.
Right now I spend a lot of time alone. I also talk to people I care about regularly, feel understood in those spaces, and don't feel lonely. The alone time is chosen and comfortable. That's a fine way to be.