Addiction is based on "pleasure factor". When something is pleasurable it creates a response in your brain to want to do it again. It's dopamine and serotonin. The more exciting and pleasurable it is, the larger is the release of these brain chemicals. Since too much of these chemicals hurt the brain it causes your receptors for these chemicals to allow less reaction. This makes you want to increase the amount stimulation to get the same effect. Drugs, sugar, caffeine, sex, it's all the same, very stimulating. When you stop doing these things the urges to satisfy become less and less. You will always have a spot in your brain that will reignite if you do them again. It never goes away, once an addict, always an addict but not doing the thing that you are addicted to keeps the temptations low and manageable.
Adopting the mind of Christ and walking in the Spirit should help you to avoid all kinds of sin, lust included. Visualize that your body is just a vehicle that you have to use to get around in this world, because that's all it is. Now, if your car steered to the left, would you give it that option, so you go in a ditch or off of a cliff? No, of course not. Just because your body has urges, doesn't mean that you have to satisfy them. You need to identify that your spirit is in control of the machine. Most of the urges man has is programming that God put into the machine to adapt and procreate. Man just allows the urges to take control and make excuses. I get it, I struggled with the same stuff for years. It seems like you need the release in order to function. When you abstain, your brain chemicals readjust and return to normal, then the urges subside. You will always want to, but the feeling will pass if you don't indulge.