I'm sorry, but there is no known cure for this condition.

All you can do is try to live with the symptoms, which include daydreaming about Disney, listening to WDW music streams constantly, and refreshing the DIS boards every fifteen seconds.
You may experience a slight recovery upon visiting WDW, however symptoms often return shortly after returning home. If so, then your condition is chronic, and frequent visits to WDW will be necessary. Warning: This course of treatment is highly addictive!
I too suffer from this malady and need to get back to the world soon before it gets too severe.