Thank you everyone. You have no idea how much I appreciate all of your advice.
When she woke up around 6, I told her she's not going back and I went over to her place to get some stuff for her. He was already gone, which was probably for the best since I couldn't get a hold of another firend to be a witness if anythign happened.
We both finally got a hold of her sister, which she lives with but wasn't home last night. She came over and we both convinced her to report it. I walked both of them to the ER and they went in together to get get everythign she needs done. At that point, the sister took over, which is completely understandable. I might be a close friend, but I am no sister.
She got back and called me to let me know, and she is just ahnging out with her sister right now. I am pretty sure they are going home to the suburbs later today.
I know she's in good hands with her sister and family, so I think I've done all I can for her today.
Once again, thank you all for everything you said. I'm sure all of you are glad we convinced her to report the *******, and I know I am.