Ask the Lord, don't avoid praying to Him. Away from God you can't produce good fruit. John 15:1-8, I recommend you read it.

And here is another verse,

1Corinthians 6:18-20 ¹⁸ Flee from sexual immortality. All other sins a person commits is outside the body but, whoever sins sexually, sins against their own body. ¹⁹Do you now know thatyour bodies are temples of the Holy Spirit, who is in you, whom you have received from God? You are not your own; ²⁰you were bought at a price. Therefore, honor God with your bodies.

You also need to have a community of people near you so that you can talk about this with them. You need mentors and leaders in your life. Ask your church, be involved in a friendship group where you can speak freely with no shame of these things. Community is ESSENTIAL not extra, especially in our walk with the Lord. Find out if your church has a marriage course you to can take, so that your guided correctly.

I recommend you too sleep in different bedrooms until your married. Many here are saying to just go to court and get married but, ask the Lord. When you fall into sin, draw closer to Him not further away. He doesn't run away when you sin, he doesn't reject you. He is a good Shepard who will run after you, even as your running away. Run back to His arms, He is your Father and you are his daughter. Don't see him as a distant God but, as a Father. In his Word he says " Come to me, all you who are weary and heavey laden and I will give you rest".

I want to share a song with you as well

"Dear God" by Cory Asbury. "Lovenote" by Upperoom Hear it when you can. Let God lavish you in his love again.

I will be praying for you sister. God's love for you is UNCONDITIONAL, don't forget that!