Your wife believes the CDing is an option, and if you love her enough, you will stop. You need to let her know that it is as much a part of you as the color of your eyes. Tell her what you wrote in your last paragraph. Tell her that you do not want to lose your marriage over this, but you cannot change who you are. You were born with this.
Invite her to come to the forum and join FAB. Read the sticky, "How to Tell Your Partner" at the top of this section.