I can't stop PMOing.

There are several ways to lower your sexual impulses, but in end, it will all depend on your willpower. And don't even think about telling me that you have no willpower.

In order to get rid of bad habits, you will have to create new and good ones. The moment you stop masturbating, you will have extra energy and time, and you will have to employ those two things in other activities. If you don't consume that energy and time, eventually, you will fall again due to boredom and over-excitement.

Reading, walking, exercising, learning a new skill, studying, working, praying, developing social skills, going out... everything will go. If you already play videogames, don't use that extra time for playing.

To develop willpower, you will have to set some goals, increasing their difficulty progressively. Of course, this goals have to benefitial habits, and it would be good if you incorporate them in your daily routine. This goals must requiere constancy and perseverance in order to be achieved.

Eating one piece of fruit a day is a good example, and a simple one. Waking up and going to sleep early, is a good way to have your necessary hours of sleep and having a productive. Limiting your use of social networks will reduce your wasted time. Etc...

This a brief introduction. Read books, articles and even NoFap posts to look for ideas on how to have under control your urges (like avoiding triggers) and how to fight them. Everybody here is going down the same path, and lots of theme share their own experience in their fight against PMO. Some of them will be able to provide you with tools and behaviours that will help you win this fight.

And maybe the most important thing: Having a reason to NoFap, and truly believing it. Whether if you do this for yourself, for your loved ones, for your girl, for your future kids and wife, for God, for getting chicks... it has to be (for yourself) a powerful motivation in which to focus and persevere during hard times.

Good luck, and stay strong.