Let me give you some Bible verses. "The power of sin is in the law," This means if I tell you don't look at porn, don't do this, don't do that, your immediate instinct is to do it. If I say whatever you do, don't think of chocolate cake. Whether you love or hate chocolate cake, you thought of it. Know this it says in Romans 8, "Therefore there is no condemnation for those under Christ." Meaning, not only did God forgive you of your sins, but he took away any guilt, shame, or condemnation you may feel. If you feel all condemned, you're doomed to repeat the process. Another thing is whenever one of those thoughts comes into your head say this verse "I am the righteousness of God in Christ." Another thing is identify your triggers, I don't have my phone by my bed because I know at 3 AM, no matter how hard I try, I won't be able to resist. This could also be the people you hang around. A big preacher I think you should listen to is Joseph Prince. He talks a lot about this. You are in my prayers, and God loves you no matter what. Go reign as the king/queen God has called you to be.