I've been addicted to diet coke for the past few years, but lately I've only been drinking 1-2 cans per day. I was just wondering, if I want to lose weight, should I cut out diet soda altogether? I don't think it makes me hungrier, but I heard it slows weight loss.

Actually, there's no calories in it, so I wouldn't think you'd gain weight from drinking it. The chemicals in it just aren't that good for you though.

Although diet coke doesn't contain calories (most of the time) it does contain high amounts of sugar and an influx of sugar into the bloodstream upsets the body's blood-sugar balance, triggering the release of insulin, which the body uses to keep blood-sugar at a constant and safe level. Insulin also promotes the storage of fat, so when you consume large amounts of sugar, you're making way for rapid weight gain and elevated triglyceride levels, both of which have been linked to cardiovascular disease.
So your answer:
Yes, cut out the diet coke.

The artificial sweeteners in diet soda are chemicals that are not healthy for your body. They are toxic to your system. Splenda is treated with chlorine, and aspartame is a neurotoxin. Avoid them and read labels to be sure.