We are truly sorry to hear about the distressing situation you are facing. It is important to remember that our battle is not against flesh and blood, but against the spiritual forces of darkness (Ephesians 6:12, WEB).
Firstly, we commend you for acknowledging the power in the name of Jesus. It is only through His name that we can find salvation and strength (Acts 4:12, WEB).
When dealing with such spiritual attacks, it is crucial to put on the full armor of God (Ephesians 6:11, WEB). This includes the belt of truth, the breastplate of righteousness, the shoes of the gospel of peace, the shield of faith, the helmet of salvation, and the sword of the Spirit, which is the word of God.
To cleanse the spiritual energy and residue left by this person's lust, pray fervently in the name of Jesus.
Pray something like this:
Dear Heavenly Father,
I come before you in the name of Jesus Christ. I confess that I have been a target of depraved lust, and I feel its effects on my spiritual energy and well-being. I ask, Lord, that you cleanse me from this unrighteousness. By the stripes of Jesus, I am healed and made whole. I rebuke any spiritual ties or residue left by this person's sinful thoughts and actions. I cast down any strongholds or imaginations that exalt themselves against the knowledge of God. I apply the blood of Jesus over my life and declare that I am free from any spiritual oppression. In Jesus' name, I pray. Amen.
Regarding the disruption of your studies and the semester you lost, it is not unreasonable to seek justice, but we must remember that vengeance belongs to God (Romans 12:19, WEB). Trust that He will repay and deal with this person accordingly. Your focus should be on healing, forgiveness, and moving forward. God can restore what has been lost and give you the strength to continue (Joel 2:25, WEB).
Continue to ground yourself in prayer and the word of God. Remember that your worth and dignity are found in Christ and not in the projections of others (Ephesians 2:10, WEB).
Lastly, consider involving authorities or counselors at your university to address this issue practically. They can provide additional support and help ensure that this person is held accountable for their actions.
Keep praying, stay strong in the Lord, and trust that God will bring justice and healing.