Should I Quit?

So, I started school at 9AM yesterday with a PolySci class, then went to a Musicianship class, and then to a Baroque performance practices class. I had a 45 minute break and then went to a Western Civ class, and then I had to run over to the music department to take a lesson with a new viola teacher they are thinking about hiring.

I have mixed opinions about the viola teacher. He gave some good tips on preparing orchestral excerpts, but he had a very narrow view on his Bach, and when he performed, I think he took too many liberties with the Mozart (considering it's Mozart :P) My conclusion: He has a nice viola :P

After the lesson, I prepared an audition for the orchestra, then went back home to change for kung fu and headed to my last class: Biology of Cancer. This class is so freaking scary, yet informative. I think everyone is going to get cancer and die. There are so many ways you can get it, even just by breathing in air on a ground level building! It's crazy. One day, they'll declare it an epidemic.

Anyway, here's the real reason I'm posting. I haven't been feeling like I want to go to Kung Fu anymore. It's just not fun for me anymore and the energy/vibe is not what it used to be. Usually, I can have a bad day and go to Kung Fu and I will feel better at the end. But lately, I still feel like shit at the end, even though I'm supposed to have tons of happy hormones swimming around in my brain :P This semester is going to be a tough one, and I don't know whether or not to quit Kung Fu?