I was setup by the mother of my ex she said that his new "girlfriend" was going to come to the house and if I showed up she was going to beat me up. I was wanting closure with my ex so I went to confront this situation. the I was approached by a woman pretending to be my ex's new girlfriend and she told me I had to leave then I told her I was there then to fight me she then pinned me to the ground and called the police. the police then just told me the battery charges against the other woman would be dropped after she was telling me I would go to jail for assault I do not know why the undercover cop decided to drop the charges and why my ex has not gotten a restraining order after a week. He has called the cops on me before with the same story that im stalking when I am not. what can I do?