When the time comes, I'm going to have to start the conversation with something along the following lines:
"Honey, I've been dipping for years, mostly behind your back, and when you have discovered my cans, I lied to you about how bad the problem was. I know that you know it was worse than I let on, but I now have to come totally clean and tell you that it was much worse than you even suspected. It was hundreds of dollars a month and hours of our precious time together thrown into the trash at convenience stores and parks (anywhere that you wouldn't find my disgusting spitters in our own trash). My addiction is very likely the biggest reason for most of our fights and why I have found excuses not to be with you. I don't expect you to forgive me quickly, but as of right now, I've quit. I quit every single day, but I last had a dip XX days ago. When you're done being rightfully mad at me, please sit down with me and help me plan out how to continue to stay quit."
This conversation is the part of this whole thing I'm looking forward to the least, but I'll have it, and it will be soon.