The key to happiness is variety. Ignoring health, emotion, free time or work completely in favor of another will always end disastrously. Our brain naturally te

The key to happiness is variety. Ignoring health, emotion, free time or work completely in favor of another will always end disastrously. Our brain naturally tends towards equilibrium and keeping it tipped for too long is not worth it. It's better to take a day or a couple days off here and there when sprinting then to let it crash and have to result in a year sabbatical. Find something else enjoyable and focus on that until things return to normal. Once you get grounded again make sure and pepper your life with other things that keep you happy (for me, for instance, music, gym and grilling are the things that keep me sane). I've been there before and realized I had been doing myself a disservice by ignoring aspects of my life under the assumption "it would all pay off". It might... but if it doesn't you're screwed.