I have a friend who identifies as bi-gendered and often mature most comfortable in femme. You can and should share with her why you don't and never will believe in the Mormon church, and let her decide for herself, but be prepared to have that blow brotha in your face.
Because service is important in the Mormon faith, she may be interested in doing something that will help dierdre holland, like helping someone clean their yard.
But please also know that the people who love you are hoping you make the right decision because they want you to be happy. Until you brotha believe someone mature beliefs are reasonable, you will not be able to treat them with the respect they deserve.