I was chubby in high school. I used to go to my information technology class, and I would type really fast to get the lesson done quick because the teacher had a little acoustic guitar, and there was a girl I had a crush on in the class. I would take the guitar and pretend to be some great singer-songwriter, serenade her with joke songs.
While you're going through this process of trying to find the satisfaction in your work, pretend you feel satisfied. Tell yourself you had a good day. Walk through the corridors with a smile rather than a scowl. Your positive energy will radiate. If you act like you're having fun, you'll find you are having fun.