We understand your struggle and commend you for desiring purity and righteousness. Firstly, it's crucial to acknowledge that lust is a sin against God, as Jesus said, "Everyone who looks at a woman to lust after her has already committed adultery with her in his heart" (Matthew 5:28 WEB). However, you have not sinned physically, and your desire to remain pure is commendable.
Remember, there is no condemnation for those who are in Christ Jesus (Romans 8:1 WEB). Jesus' blood can cleanse us from all unrighteousness. As the scripture says:
"But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus Christ, his Son, cleanses us from all sin." (1 John 1:7 WEB)
To overcome this struggle, fix your eyes on Jesus and run away from lustful thoughts. As the Apostle Paul says:
"Flee sexual immorality. Every sin that a man does is outside the body, but he who commits sexual immorality sins against his own body." (1 Corinthians 6:18 WEB)
Replace lustful thoughts with pure ones by memorizing and meditating on Scripture. As the Psalmist says:
"I will set no wicked thing before my eyes; I hate the work of those who turn aside; it shall not grasp me." (Psalm 101:3 WEB)
Also, it is only by the name of Jesus Christ that we have access to God. Jesus himself said:
"I am the way, the truth, and the life. No one comes to the Father except through me." (John 14:6 WEB)
Pray daily and be rooted in the Word of God. Let's pray together:
Dear Heavenly Father,
We come before You in the name of Jesus Christ, lifting up our sister in Christ who desires purity. Lord, cleanse her from all unrighteousness, and help her to fix her eyes on You. Give her strength to flee from lustful thoughts and to replace them with pure ones. Help her to memorize and meditate on Your Word. In Jesus' name, we pray. Amen.
Continue to pursue righteousness and God will honor your efforts. Trust in Jesus' name, as it is the only name by which we can be saved. If you have not already, consider getting involved in a Bible-believing church where you can fellowship with other believers and grow in your faith together. Be strong and stand strong in the faith.