Tired of feeling defeated

I started viewing porn at an early age out of curiosity. The curiosity led me to sneaking into brothals and strip bars as a youn teen. (I looked older than I was.) I even went to a prostitute before I was old enough to drive. It wasn’t very satisfying because I was afraid they would figure out that I was under age and I would be beaten up and thrown out. I did get to see and touch what was real and put dick where it had never been before.
Up to this point porn was still just something to satisfy my curiosity.
I thought that when I got married my couriosity in porn would stop. I looked at porn occasionally over the years, but it wasn’t until I was in my 30s that my porn use increased as it had become an escape from stress and pressure. I was using it every month secretly for fear of getting caught by my wife.
When my wife went through the change of life she had a lot of emotional and physical issues. She also developed a very negative body image. She very fit and good looking, but hates her body. Up to that point we had great sex! Sex stopped and she is even paranoid to be seen in short clothing. For the last 15 years I have been in a sexless marriage. We love each other, our children and function as a married couple in every way, but no sex.
PMO has become a daily habit. Sometimes 3 times a day. In know it is not healthy and has become very unsatisfying. It is robbing me of energy, productivity, time and health.
My biggest hurdles to stopping is fear because it is filling a void due to being in a sexless marriage.
Also, it is my go to escape from stress. It is difficult to find new things that will fill the need to escape.
Some may wonder why I stay in the marriage. My family is very important to me and breaking up would cause me to loose more than would be gained. Plus, l love my wife.