Can a domestic violence case be successfully fought and dropped from record

My girlfriend and I had a fight, she was arrested for a domestic violence charge for just slapping me. I don't feel she's an offender just a stupid fight. the state is prosecuting the case and I as the victim want the case dropped as well as she does too. Is it better odds for that to happen if I am represented in court or if she is? I would testify in her defense in order to do this. She does not need the 2 years probation nor the classes that are way expensive. We just had poor judgement resulting in the state of Colorado taking this to far. Please let me know