Send me a large external usb hard drive and I'll give you more porn than you can watch. There will be no incentive to waste time getting more because you have lots of movies that you haven't even watched.
Or is it a addiction to downloading (aka hording, gathering, saving, collecting)? Some people like collecting more than actually watching. If you are happy with how much porn you currently have, this is where to start first. Have you fiancée install one of those adult-content filters on your computer. Or block it at the ISP level. And take a three or four day vacation with no computers the first few days afterwards. That will break up the routine, then make sure you keep yourself busy after that.
The other option is getting therapy or professional consuling. If things don't get better, it might be a good thing to get professional help.
There is also the iron fist version over in China. You could get sent away and come back in a few weeks all better, but not quite all there...
Internet addiction defined in China, entire Engadget staff now officially certifiable
(This is one of my favorite pictures from 2008, that is why I remembered this site.)