Perhaps read Bill's pamphlet, Emotional Sobriety where he talks about the importance of breaking dependencies on people and even AA. Kind of transitioning from child to parent. Sponsors are human, they have feet of clay and they are not always going to be there. Like mine, they may even die.
On page 14/15 of the Big Book, Ebby warns Bill that there will be low spots ahead and tells him what he must do to survive. It seems to hinge around work and self sacrifice for others rather than dependence on them.