You can get addicted to everything that stimulates the reward center in the brain. It is hard to get rid of addictions, but it is possible if you work on it. It is possible to change the settings of a web browser so that it does not allow going to pornographic web sites. This is usually used by parents to prevent their children from seeing pornography on the web. Find other interests and force yourself to be occupied with something during the first hard weeks.
Try to get into contact with the feelings which occur when you refuse yourself from seeing pornography.