How to care less at work?

Currently in a job I love, I have a good lifestyle and good pay but it is definitely high stress. I’m taking my work stress home, and I honestly care far too much about the company (small business). As someone in their late 20s, how do I stop this cycle before it destroys my relationships? Because it’s high stress there’s always something to be worrying about and I let it consume me.

I have incredible bosses, no one has expected me to this but I do it to myself. Any advice appreciated please.