You are not a machine. You are a human being. Take breaks, use your PTO, go for walks, travel, go outside, and spend time with the people you love. Your life was never meant to be an endless cycle of work and deadlines, and I think it's important to remember that.
Underrated life advice: Keep more evidence of your progress. Journal entries. Photos. Notes. Old goals. We spend so much time focused on how far we have left to go that we forget how far we've already come. Sometimes perspective is the only motivation you need.