There is a lot of research out that about how pets are good for your health. Here are just a few things that we found:
https://www.care2.com/greenliving/5-reasons-cats-make-you-feel-better.html
https://www.webmd.com/hypertension-high-blood-pressure/features/6-ways-pets-improve-your-health#1
https://www.somepets.com/15-pictures-that-will-make-you-feel-better/
We personally think that cats are even better than other pets (like dogs):
https://www.thesprucepets.com/why-cats-are-better-than-dogs-554880