I had to face something similar. I certainly didn't consider leaving to go back to something less intense, I just ramped up cutting out everything that wasn't f

I had to face something similar. I certainly didn't consider leaving to go back to something less intense, I just ramped up cutting out everything that wasn't family and startup. Not for everyone but eventually I made it sustainable. I would surface the concerns to your co founders. If they don't have kids, it's harder to understand, but this is the kind of thing where they will generally have already noticed so a conversation will be welcome.