Needing Help with Job

Hello everyone just sitting here tonight trying to think about my job. I go there every day to work but find myself doing my boss job most of the time. I find that most people would rather deal witb me then him. It seems to me that they come to meet because I can get things done. I will not sit here and say that I am the best worker but I get positive results. That has always been that way with me since I been in the Army. Also I have told him how I feel that I always have to do his job when he is not there, and even when he is there he will give me stuff to do which he should get done hinself. Things he does always come back to me to take care of. Most people prefer to deal with me guess good customer service lmao. I try my best to make things happen when they need to be done. He is also sitting in the position I should have had years ago. I'm getting to the point where I can't finish my job because I have to do his. Someone please let me know what I can do to make him realized that he is not completing his task. Like I said i have done that but maybe someone could give me some Ideas on how to make him understand that.