Porn... porn is all about lust. Lust and love have something in common, both can be expressed through sex. Many people go through battles with lust. Our hormones help fuel that and fighting temptation can be a hard thing to do. Love though is having a pure relationship and only expressing yourself once married. Being pure doesn't mean you won't ever have it on your mind, but choosing to deny temptation when in front of you. Think about King David, his battle in 2 Samuel 11:1-5  “And it came to pass in an eveningtide, that David arose from off his bed, and walked upon the roof of the king’s house: and from the roof he saw a woman washing herself; and the woman was very beautiful to look upon. And David sent and enquired after the woman. And one said, Is not this Bathsheba, the daughter of Eliam, the wife of Uriah the Hittite? And David sent messengers, and took her; and she came in unto him, and he lay with her; for she was purified from her uncleanness: and she returned unto her house. And the woman conceived, and sent and told David, and said, I am with child.”

There are things you can do to fight lust. Keep yourself busy, live your life, your goals and try to achieve them. Write them down, journal about them so that you can see what you are looking to accomplish. Rather than sitting down at the laptop to view porn look through your journal. [James 1:12–15 KJV] “Blessed is the man that endureth temptation: for when he is tried, he shall receive the crown of life, which the Lord hath promised to them that love him. Let no man say when he is tempted, I am tempted of God: for God cannot be tempted with evil, neither tempteth he any man: But every man is tempted, when he is drawn away of his own lust, and enticed. Then when lust hath conceived, it bringeth forth sin: and sin, when it is finished, bringeth forth death.

Prayer is another great tool! Prayer is one of the most important tools to gain strength and being able to talk to God is always freeing, you don't have to hide anything from Him because he already knows everything! . [Rom 1:21 KJV] “Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.” A consistent prayer life is one of the best ways to avoid the pitfalls of sin. 

[1 Cor 6:18–20 KJV] “Flee fornication. Every sin that a man doeth is without the body; but he that committeth fornication sinneth against his own body. What? know ye not that your body is the temple of the Holy Ghost which is in you, which ye have of God, and ye are not your own? For ye are bought with a price: therefore glorify God in your body, and in your spirit, which are God’s.” What this verse implies is that we should avoid situations where we know temptation will be harder to overcome.

The sin of lust can be overcome. Keep working at being an overcoming Christian by prayer, bible study, and staying pure through activities involving making good use of your time. If you are married, try re-kindling your relationship with your spouse.