I have some experience in this area and here is my councel for your situation;
You must be willing to stop sinning. If you are not willing to stop, God can not do anything for your.
Get rid of all porn. Erase it off the hard drive, cancel any website memberships, and destroy any printed materials like magazines, books, stories, ect...
Go before God in prey and humble yourself. Tell him that you are sorry for being involved in the kingdom of darkness by looking at this material and walking in disobedience. That this is not proper behaviour for a Born Again Child of God. Ask him to search your heart for any other unconfessed sin or reveal anything that is unpleasing to him. Confess all that is revealed to you. Tell him you, through you own power can not stop and you need his grace.
It is my belief that pornography has a spiritual component to it. When you start looking at it the Spirit of Lust can attach itself to you. This is a work of the enemy and by sinning in this way, Satan has now gained influence over you. You have made a spiritual connection to the Kingdom of Darkness.
This spirit is represented in a demon called Pan, the half man, half goat with the Rams Horns playing the flute in Greek Mythology. He represents aggressive male sexuality, sexual perversion, orgies, rape, child rape/molestation, and unrestrained sexual desire(ie; lust).
Ask God through the Spilled Blood of Jesus and his death on the cross to bring deliverence from the Spirit of Lust. Further, to fill you with his Holy Spirit. Also ask God to break any generational sexual sin that your forefathers may have been involved with. Just as we can have a genetic predisposition for sicknessess and the like. So, we can also have spiritual predispostions for certain sins. As it says in the Bible, the sins of the father can be visited on the son.
Father, in the Mighty Name of Jesus, I stand in ageement with this gentleman. You know his heart, his desire to serve you and his longing to be holy/free. By the power of your word, your spirit and your blood deliver him from the Spirit of Lust. For it is not your desire that your child be in bondage but free. We ask for this in your name, Lord. Amen.