Let's bring this situation before the Lord in prayer and seek His will for your upcoming trip and relationship. Firstly, it's important to acknowledge that God's design for a romantic relationship is one that is holy and honorable, leading to marriage. Also, romantic getaways should be in the context of marriage.
We need to address that the struggle with inner demons may indicate a spiritual battle, but it may look like anxiety, fear, or other mental health issues and could require professional help, including Christian counseling. Breaking up and reconciling repeatedly isn't God's design for a healthy relationship. God's word says in First Corinthians 13:4-7 WEB:
Love is patient and is kind; love doesn't envy. Love doesn't brag, is not proud, doesn't behave itself inappropriately, doesn't seek its own way, is not provoked, takes no account of evil; doesn't rejoice in unrighteousness, but rejoices with the truth; bears all things, believes all things, hopes all things, endures all things.
We pray that you both will strive to embody this kind of love in your relationship.
We also need to address that you mentioned enjoying yourselves together romantically. We want to remind you that God's word is clear about sexual immorality. Ephesians 5:3 WEB says:
But sexual immorality, and all uncleanness, or covetousness, let it not even be mentioned among you, as becomes saints.
Therefore do not find enjoyment in a sexual relationship outside of marriage.
Let's pray:
Heavenly Father, we come before You in Jesus' name, lifting up this couple and their upcoming trip to ###. We pray for Your will to be done in their lives and relationship. We rebuke any spirits of anxiety, fear, or confusion that may be causing inner demons, and we ask You to bring peace and healing. We also pray against any sexual immorality and ask God to help you both remain pure before marriage. Please provide guidance and wisdom, and help them to communicate effectively and resolve any issues in a healthy, godly manner. We pray that this trip will be a blessing to them both and ultimately draw them closer to You. Lord, please work in their hearts and relationships. Father, please bring a conviction to their hearts if they are not walking in Your will for their lives and relationships. If they are not saved and do not have a relationship with Jesus, then please bring conviction to their hearts and lead them to a saving knowledge of Jesus Christ. Father God, we ask this in Jesus' name. Amen.
We encourage both of you to seek God's will for your lives individually and as a couple. Pursue righteousness and holiness, and let His love guide your actions and decisions. Lastly, we are concerned that Jesus was not mentioned in your request. We can only approach God in the name of Jesus Christ. In Acts chapter 4 verse 12, the Word of God says:
Neither is there salvation in any other, for there is no other name under heaven, that is given among men, by which we must be saved!
Therefore, please make sure to put your faith in Jesus Christ and pray in His name.
Prayer Focus: God, Thank You. Thank You for loving me. God, I ask You in Jesus’ name bless me with everything that I stand in need of and everything You want me to have. Bless me to know You in truth, fall in love with You with all my heart, mind, soul, body, and strength and never fall out of love with You. Bless me to have an ever growing closer stronger, more intimate relationship with You. Bless me with the love, desire, strength, and the spirit of obedience to always delight myself in You, seek first Your kingdom, and Your righteousness. Help and strengthen me God to always respect and obey You. Bless me to trust You with all my heart, acknowledge You in all my ways, and lean not to my own understanding. 
