I've been eating Paleo on and off for a couple of years. I'm now a month deep in what I'd call "my strictest attempt yet" at Paleo. I know my physical addictions are giving way and my habitual routine/mental side at this point. I know this because I'm starting to have similar dreams about eating grains, pizza, etc. Haha. I'm just as dissapointed too!
So no, maybe my cravings will never REALLY go away, but when I consider the implications of various addictions I'm easily reminded of why I quit in the first place. Being a human means self-control and the pride you feel when you have it. If you're eating enough fat and not cheating, you should have minimal cravings. Are you planning your self-sabotage perhaps?
Final thought: when I think back to the times that I fell off the paleo-wagon; in every case I was trying to do a high-protein, low-fat, low-carb WOE. It's frickin' futile! Now I'm 70%+ fat, 20%Protein, 10% carb...and its been the most effective WOE yet.