Burned out.  This is a term you use when you are tired to the point where you can no longer work or focus.  What have you done to nurture yourself lately?  Do you have a work ethic that tells you it is not okay to relax?  Do you push yourself incessantly?  Where is the balance?  Do remember that the light inside never goes out and cannot truly burn out. Even when the physical body no longer functions, the light being you are continues growing and learning, but you can do so whilst having a bit of fun or relaxing.  Seek balance in all things.