2 articles
You get things done. You show up. You are dependable, often impressive. You have a good sense of humour about the pressure you're under. You are, in most of the ways that are visible, fine.
One of the most disorienting things about burnout is that you often don't see it coming. Not because it isn't happening, but because many of its early stages look, from the inside, like exactly the right thing to be doing.