We understand that you are dealing with a difficult situation, and we are here to pray with you and provide guidance based on biblical principles.
Firstly, we want to address the fact that we need to pray in Jesus' name. We notice that you have mentioned God, but we need to be clear on this. It is only by the name of Jesus that we have access to God. John 14:13-14: "Whatever you ask in my name, that will I do, that the Father may be glorified in the Son. If you ask anything in my name, I will do it."
In the situation you describe, it seems your life is being impacted by fear. We should examine if this is due to an unhealthy attachment to Jason. You might want to consider his influence in your life and whether he is spiritually good for you. You seem to want him out of your life, but then mention 'I love him.' Make sure that you do not act in a way that condones his actions. We need to rebuke anything that would resemble hatred or a desire for revenge and to remember that love is a powerful force for good.
First John 4:18 reminds us, "There is no fear in love; but perfect love casts out fear, because fear has punishment. He who fears is not made perfect in love." We also need to pray for Jason and to want what is best for him. God doesn't want us to harbor ill will toward anyone, but rather to love them and pray for their well-being. But, you need to have no fellowship with his evil deeds. Ephesians 5:11 says, "Have no fellowship with the unfruitful works of darkness, but rather even reprove them."
Consider Matthew 5:44: "But I tell you, love your enemies, and those who wrongfully hate you, and those who are against you and persecute you." This does not mean that you can be with him, but that you forgive him and want what is best for him. We should pray that God would take care of him and protect you.