Why do you want to quit your job? Is your job making you unhappy? If this is the case, you can try to change your job. In fact, I also feel that I cannot be happy. My signature is "I have forgotten how to be happy, and I have forgotten how to be sad." However, sometimes I chat with my colleagues at work. I'll be quite happy, but when I'm alone in the room, I always have random thoughts and like to cry. If you are happy, you may be unhappy. Try to relax and chat more with friends.
Don't always stay alone in the room like me~ Haha
~As my classmate told me, "So many people are unhappy, why are you still unhappy? Just joining in the fun"