If you masturbate often and don’t feel the relief you expect, thus feeling addicted to sex/masturbation: is it really cumming you are after or do seek the intimacy that comes with sexual relationships? If it’s the latter, you may not be “addicted”, you just tried to use the wrong tool for the job (pun intended). While this may not bring any improvement to your situation, at least know that you are not broken. Trying to fix the longing for intimacy with masturbation is just like trying to fix thirst by drinking oil. It may seem related, yet will ultimately get you nowhere.
The only way to know is to finally find the trigger and if the “addiction” goes away as a result. I found out a few things about myself that helped me to kick my desires that were running me ragged. Definitely wasn’t an addiction. Now finding out that I have other things on the other side that are keeping me from being able to be completely balanced. We are very complex beings.