Please fire me. I have worked at my job for 2 years. All my managers have told me that I am one of...

Please fire me. I have worked at my job for 2 years. All my managers have told me that I am one of their best employees and know the store inside and out. My employer then promised me a managers position after I turned 18 and graduated. When the summer rolled around, I waited for my promotion, only to find out it was given to a 16 year old new hire who kissed up to my employer. I am now on suspension because a trainee forgot to put toilet paper in the restrooms.