Bree,
A sponsor is someone who is working a program of recovery and agrees to help you in your own recovery. Its a very strong bond, commitment, often friendship. Sponsorship varies, my sponsor is just someone whom I can call to bounce ideas off of, and someone whose sole purpose is to help me in my recovery. She can be brutally honest with me and I will listen to her, knowing that she is only telling me what she sees or thinks in how it relates to MY RECOVERY. Other people have sponsors who give them assignments and homework, all sorts of stuff to help you along the road to recovery.
Good luck. Oh, I have a book to recommend too - the Emotionally Abused Woman. It was a good read and helped me to understand a LOT about myself.
hugs
Barb