I understand.

I had stuff I was so ashamed of -- I didn't even want to tell it to a dead man!

Did the book say that the human being had to be alive???
Well. I'm not going to comment on this one.

However, I will say -- that if it were me -- I'd ask my sponsor these questions.
At some point -- it's vital that we establish trust with our sponsor. I believe the reason that we have to do this -- is because when we "trust God" -- people like me are just bs'ing themselves about trusting God! They think they trust God. They believe they trust God. But, it's a delusion.
There is only two times I can have fear:
a. When I'm thinking about myself. And,
b. When I'm not trusting God.
For me, it's about "Faith without works is dead." If I really do have faith -- then, why am I afraid?
I'm wishing the best for you -- and I happen to believe -- that whatever you decide to do will be the right thing. And, the only problem is: it doesn't matter if I'm right or if I'm wrong -- it only matters if you're right!
Enjoy your time with your sponsor! You'll be glad you did.
Dallas