I think I may have been the victim of a hit and run, and possibly some other crimes but i'm not sure if what happened fits any legal definitions.

Dear sir, I was recently rear ended by a driver at a stop light. She failed to stop and provide information, or to even check if I was ok. I had to follow her to where she was going and park near her just to get her to speak to me. The problem is that I know this woman and we were both driving to a planned outing together in separate cars. When I got out of my truck, I asked her for her information. She refused to give it to me, saying only "don't worry, i'll pay for it. Whatever it costs, I'll pay for it." I didn't know what to do about that, so I just decided to trust her, thinking I could always get her information later on if there was any problem. I later learned that she was uninsured, and the car she was driving didnt even belong to her. I also learned that she was high on pot marijuana at the time of the accident. Now she says she wont pay anything, no matter what. I got her to confess to everything on facebook. Now what do i do?