How long I can be a victim?

This is how it happens with almost each one of us. You are no exception.
I am glad that you have realised the following, about PMO (I assume you are struggling with this):

• It is worthless,
  
• exhausting
• disgusting
• it is making you weaker
• vicious cycle it is

Congratulations! You have taken the first step.

Let's talk about what to do next? But before that, let's talk about a very interesting thing about being human.
"You can think about your own thoughts, you are capable to reason and either support or refute an argument/assumption/fact".

So go ahead and observe what happens when you indulge and finally end up PMO'ing. Important thing to note is that it all starts with a thought/trigger that you act in a certain way. So sit and challenge your assumption about everything PMO. Do you really need to see porn to feel happy/good? Do you really need to see naked bodies or someone else having sex to feel great? The answer would NO.

Answer is simply getting longer, the point is ask why you are doing the stupid mistake again. It is not because you are stupid. It is because you have stopped reasoning against your thoughts and senses when they automatically make you seek PMO for the momentarily shattering your nervous system.
Start asking it and command it to follow your commands. And it will listen to you gradually. There is no magic pill to sort it out in a month or 90 days... Stay away from PMO and then you will start to reason with your intellect and guide it the way you want it to go.

Wish you all the best! Apply some will-power and get busy. Make better choices! Don't choose indulgence and PMO. We can't run away from triggers, whole world is sexualised. There is no escape. Make your mind your best friend, not worst enemy.

 

Been where you're at. I'm still recovering from my last relapse too, friend. We all know that PMO is lame, but how dedicated have you been in ending this addiction? Every day, you must study and research what PMO does to you and your brain and come up with a plan to deal with those physiological changes. Reflect back on your goals often, track your progress towards your goals, and give yourself something to be proud of. Your future self will thank you