I had a version of this realization early in my life. I wanted to be a musician. I thought that school and other things in life were a burden and that once I was devoted to music, I'd be happy and full. I got my dream by 18 years old. When music became my work I hated it. Made me think differently about life.
I think when it is no longer your job you might begin to enjoy it again?
My career turned out to be software engineering because I liked writing software as a hobby. The job does take the software-writing energy out of me. But from time to time when I have started a little project of my own I have found it to be enjoyable again.