Giving feedback to the person who signs your paycheck can be scary. A good boss will be open and receptive to your suggestions, but an inexperienced or less-than-par boss may become defensive or upset.
While it is never easy to give someone constructive feedback, it is especially tough when that person is your boss. Never let that stop you, though. Not only will giving feedback make you feel better about a sticky situation, it is your responsibility as an employee.