How do I stop feeling like I can never rest in my business?

You can evolve your business to stay alive, and you are tired of never being able to rest on what you built. That tiredness is honest. You keep the thing breathing by constantly reshaping it, and there is no finish line where you get to simply enjoy what you made. The hard truth is that a living business is more like a garden than a monument. It does not stay built. It grows or it fades, and tending it is the price of it staying alive. That is not a failure on your part. It is the nature of the thing you chose to build. But rest and growth are not opposites. You can build small pauses into the work without stopping it, a season, a week, one part of the business you let run steady while you breathe. You will not get a permanent rest, but you do not need one. You need enough recovery to keep going. Give yourself that on purpose, before exhaustion takes it for you.