Ask HN: How to Have a Life Without Seeming Lazy?

I am a mid-level front-end developer at a startup. I am passionate about the product we are building and enjoy working with my colleagues. Lately, however, things have been stressful at work due to the launch and I had to work overtime. Even when I’m not working I still have to be available in slack. Others seem to be okay with this kind of environment and they seem to be very hard-working.

My question is, how do I demand respect for my free time without seeming like I’m lazy? Is it possible to be a passionate employee and have a life of my own?