Thanks for your patience while I typed up my response!
Unfortunately since criminal charges have officially been filed, the decision to dismiss the case/ drop the charges is out of your hands, and is now in the prosecutor's hands.
That being said, what you can do is let the prosecutor know that you are unwilling to testify in the case and that you do in fact want the charges dismissed.
It will then be left to the prosecutor to determine whether they can prove the case without your cooperation, ie. whether they have other evidence like photos, witness statements, etc sufficient to prove the case.
If they do, then they will still continue with the case. However if they do NOT have enough evidence without your cooperation then they will be forced to drop the charges.
I hope that helps! Please let me know if you have any other questions. Also, please take a moment to kindly rate me using 3 stars or more, as this is the only way experts are compensated for our time here on 'just answer'. I do not receive a salary here, and am only compensated for my time after you leave me a positive rating. The question won't close after you rate me, so you can still ask any follow-up questions you might have. Thanks so much, I appreciate it!