Here's how I read this: I think she didn't realize the extent of your commitment with school and the time it would take, noticed that you weren't as available for meetings and time to talk/check-in with her, and brought it up so that if you WERE having issues with her as your sponsor, you would feel free to go to someone who you can better connect with in order to help your sobriety. I think she just wants you to be able to have the best success in your sobriety and wanted you to know that if it were a conflict with her that was keeping you away, you shouldn't feel at all bad at getting someone else.
Just a different take.
