I think mnw21cam's point still stands - if working at your current position is "seriously affects the quality of [your] life", you need to prioritize that over making money for your boyfriend's startup, or you'll hold it against both him and the company for making you do something you don't want to.
Take care of yourself first, even if it means a slower launch for the startup! And it sounds like you have good coding practices and are well-regarded at your current position, so hopefully you could find another job that is more aligned with your values. Best of luck!
Take care of yourself first, even if it means a slower launch for the startup! And it sounds like you have good coding practices and are well-regarded at your current position, so hopefully you could find another job that is more aligned with your values. Best of luck!