Isolated vs Lonely

To me,

I love being isolated by choice.
I get really productive being alone and can really focus on a lot of items.

Being lonely is a very empty feeling.
Unfulfilled & uncared for.

Does anyone else ever get similar feelings?

I try to differentiate the two when they occur to remind myself that being alone isn’t bad could take it as a reminder I should invest in my social circle & emotional diet.