My basic premise is to tell her that I understand that I am essentially the reason that she has no sex drive.
This is a false premise NTE: you're beating yourself up way too much here.
SHE bears just as much responsibility for the situation as you do. It isn't just her problem; it isn't just your problem; the two of you TOGETHER, have a problem AS A COUPLE. She can't just sit back and wait for you to fix yourself, neither can you wait on her to fix herself. Nothing will be fixed until both of you work on fixing it -- together.
[puts away 2 x 4]
-- B.
Me 50, W 45, M for 26 yrs S25, D23, S13, S10 20+ year SSM; recovery began Oct 2007