It is something you will probably have to share with your wife at some point, as there are likely underlying emotional issues behind the pornography use. It is extremely dangerous & destructive, and my recent interviews with our stake presidency have impressed on me how important the law of chastity is to worthiness. I would agree that you should talk about this with your bishop/leaders so you can get on the path to repentance, before, as another poster said, you lose everything you love. It is that serious.