I want to say I am so sorry, I know how you feel. My sponsor also relapsed and it broke my heart. She was very active in the program and sponsored many women. We all went over to her house and talked to her. She thinks she can drink again.
I had to cut ties with her. I couldn't watch her slowly kill herself. Some other of the girls call her once a week just to see how she is doing.
I am glad you got a new sponsor and realized that your recovery comes first. I agree with the others, talk to the old timers and see what they have to say.