First of all, I am sorry for what you are going through. It must feel like no matter how hard you try to stay on the up and up with school and work, sometimes your body just stops you. It says, no not today. Most people see this as a fault, but it is an organic sickness. I think you should tell him what you have so at least he has some basis to start from to know where you are at. This must be a scary thing for you to contemplate, but maybe he will be empathetic. I say empathetic, because no one can understand what you are going through, because you are unique and no one lives in your body. Tell him your mind wants to go to work (everyday), and your mind wants to go to class (all the time), but sometimes your body just stops you. There is definitely a disconnect sometimes. I am hoping for you, and take the best care of yourself.