I'm sorry that you have been addicted to it. If it's something you want to stop, it can be hard. (I know, I'm trying to stop myself)
I was stuck in the cycle, able to stop for a few days, then failing again.
I would recommend telling someone you know. Someone you can trust. Call them when you are struggling.Visit sites like http://combatingpornography.org can help. Good luck. having a friend there has help me and I'm almost at 5 months myself. I thought at first it's impossible, but now I know it is, but you need someone to help you though it. Or at least I did. I know myself and Know that I'm not that strong and I needed someone. Hope everything works out for you. Send me a message if you want!
Tach
Consider a substitution activity to do every time you feel the urge. Try to make it healthy, like exercise.