If someone brings you a barrel of marble to count it, you switch your job, because there are other companies, who'll pay you for reasonable work. Don't degrade yourself to the level of a bootlicker. Other than that I agree to let things work out how your boss told you, unless he/she makes a serious attempt at respecting you and your work and earned the truth. At least for me, boring work isn't good for my mental health, as my mind wants to be used for something. You got to have some self respect.