Interesting article. I wasn't sure if diet soda contributed to weight gain or not. Long ago when I was trying to lose weight, I did drink 1 or 2 diet sodas a day and did lose. I really don't care for the stuff now. It just got harder for me to finish a soda after awhile and now I just don't drink it. Sometimes I crave the carbonation but I just opt for water usually.
I would just try to drink tons of water and limit it to one per day. You might actually stop craving it with all the water you're drinking instead.