You sound like you’ve got to a place of contentment and you are at ease with yourself? That’s fantastic!

I think solitude can be a very good state, loneliness is different. To me, loneliness can happen even when you are with others but don’t feel connected or understood- that’s an unpleasant feeling, like being in a bad marriage/relationship. Whereas solitude can be a happy and centred state, as you describe.