Thats a good way to get her to break up with you.
Hes in high school man, she's not gonna want to be controlled. She broke up (I asume) With the other guy becouse he was too controlling. And just as there are women in life who like to be controlled, there are those whom want to control.
anyway, my advice to op is to spend as much time with her as possible. After she graduates, and you are still together, she will most likely have a job.
Ask her out on one of her days off, not all of them mind you! People like to relax and just veg out on some of their days off.