1st step : Are you eager enough to free yourself from the shackles of porn?, if you aren't - no point going to step 2.
2nd step : try to create an internet free environment in your house, that means no mobile internet or internet access on your computer - smash the router, if you can't achieve that then try to create a porn free environment by installing k9 web protection on every single PC that has internet access, that way you'll have internet access without the porn.
3rd step : You are addicted to porn because it gives you relief, after each porn-watching session different chemicals are released into your brain, in gigantic volumes, this makes you feel wonderful whenever you are angry, sad, lonely, tired, bored - you name it. Porn acts as a coping mechanism to help you with whatever life throws at you. Basically, negative thinking = Porn, you have programmed your brain to function in this way. Whenever you are angry, sad, lonely, tired or bored your brain has different options on what can give you relief from these negative emotions, and porn is the best option because it releases the most amount of feel-good chemicals.
So what you have to do is start having a positive outlook on life, Turn every situation into a positive one in your mind. If you lost your wallet dont be angry, just say : I can always buy another one and so on. (Not the best example but i hope you understand)
4th step: Worship, Worship and more Worship ( I am happy that you're already doing that

)
5th step : Activity: you really need to keep yourself busy...stay away from computers as much as you can.....play football, converse with your mum, your friends, your father atleast 1 hour a day. hit the gym, go for a jog.
6th step : Avoid things that could triggers urges, for example, stay clear away from tv shows which has a lot of suggestive behavior or nudity, etc.
7th step : Monitor your progress by having a journal...jot things down every few days, on your front page you could write how porn has reduced you to a person who once had a life but now is on the verge of losing it completely, this will motivate you insha'Allah
8th step : Education : Learn why you are addicted to porn, this is probably the biggest exam you'll probably ever do, and it wouldn't be wise to sit any exam with little or no studying done on the subject you are being tested on, would it?
Marriage is not the cure, the same way marriage will not cure a heroin addict - you are addicted to chemicals which are produced in your brain, what unlocks these chemicals? Porn, you need an equilibrium, a balance of some sort and inshaAllah after a few months you will be cured , but only if you change your lifestyle, and if you are lazy one second just one second, you will have lost the battle, always be on your toes and make dua for Allah to make it easy for you, because they say that it's harder to quit than cocaine.
Check this website out for more info : Yourbrainonporn.com