I am thinking about calling the cops on my girlfriend.
Why call the cops on her?
She is never on time when it comes to picking me up.
That is not a good reason to call the cops. It is a waste of time, and that is something you need to resolve with her yourself.
I just want to tell the cops I'm her boyfriend so they can find her faster.
The cops are going to be upset if you call them over an issue like this. This is something you should talk to your girlfriend about instead of trying to have the cops intervene.