I totally agree with everyone that suggests that you give yourself a breather from religion. Just give that part of your life a rest and use the time to expand your interests.
As to your addiction? A sociologist that I knew told me that 85% of all men admit that they masturbate whether they have porn available or not. Then he told me that the other 15% are lying. Unless you are dysfunctional or a castrato, if you are under 70 years old you'll probably look at porn or conjure up visions in your head. It's wired into your brain. If you are busy doing other things, then you can control your urges and reduce your need for visual stimulation.
The HBO TV series "Rome" had sets that showed porn drawn on the walls of buildings all over the city. Most graffiti was porn. Art and statues of gods, goddesses and even heroes were typically naked or show in suggestive poses. When they dug up Pompei a few years ago they discovered pornographic images all over the wall of the public bathhouses and wealthy homes. It was just part of their culture.
The Witness leaders have this mindset that is similar to that of my grandmother's. She and my grandfather were married for nearly 70 years, but she always dressed in a closet out of his view and always wore a beddress when they slept. She proudly announced on several occasions that Granddad had never seen her naked. Of course, she was my grandmother, and the idea of seeing her naked is a stomach-turner for me. But she just felt it was sinful to be naked in front of a man.
My guess is that there are quite a few serial porn viewers even among the Governing Body - it's so easy to get.
So if you really are confused and feel that your particular taste in porn is damaging to your mental health or that it may lead you to commit criminal acts, then go get some professional help from a medically degreed professional - not from a religious charlatan or a preacher that is a so-called expert.
JV