Welcome!
As someone who became addicted long before the internet came along, I would say that I abused myself, specifically, my ability to become sexually excited, as a way to escape life.
The way out centered on stopping all forms of inappropriate stimulation of this aspect of my mind and body. Specifically, I needed to learn to guard my eyes aggressively by not looking at ANY women except my immediate family unless absolutely necessary. Not in pictures, not in tznius clothes, not their faces and not their anything.
Then I needed to learn to guard my mind against the incessant fantasies and images I learned to "love." For this, I learned to bring Hashem into the battle, as practiced by those with a proven track record for recovery. I developed a little tefilla, based on the first 3 of the 12 steps to recovery, and I would say it (still do, and I'm sober almost 4 years) whenever a thought would attempt to land. Dozens of times a day at first. I internalized the message of what I was saying, and began to live it. Here's the tefilla --
Ribono Shel Olam, I am powerless over lust and my life has become unmanageable.
Only You can restore me to sanity.
I turn my life and my lust over to Your care and ask you to please heal me from this illness of lust. I don’t want to lust. I only want You and a relationship with You and your Torah (and appropriate attraction and interaction with my wife). I surrender my lust to you. Please take my lust.
Doing this can get you sober, meaning off the lust drug. Then you can work on recovery, which involves working on the character flaws which led to and perpetuate the addiction.
Hatzlocha!
Alex