I had huge work life (self induced) challenges for 8 or so years at the start of my career. Similar story to you but not as a founder- I just worked 80+ hours a week by default. Nobody forced me to do it, just my motor.
I worked with a psychotherapist for 4 years, once a week, with this being the predominant focus of our time together. She was immensely helpful and between the regular maintenance of those visits and her helping improve my self awareness, I now no longer blitz myself week after week. I certainly still have that motor in me, but I know how to divert it to other activities and focuses like my family, hobbies, and myself. I still love to work because I love what I do, but it’s not how I define my life.
Get help. This is sufficiently a problem where it’s impacting your relationships with others, which is a huge red flag.