We understand your desire for restoration in your relationship, and we want to help you pray and navigate this situation according to God's will and biblical principles. First, let's address the issues and then we will present the prayer.
It's important to note that the Bible teaches us to be equally yoked with fellow believers.
Do not be unequally yoked with unbelievers, for what fellowship have righteousness and iniquity? Or what communion has light with darkness? 2 Corinthians 6:14 WEB
As a boyfriend girlfriend relationship should be treated as courtship leading to marriage, it is extremely important that you both are believers in Jesus Christ. However, you did not mention anything about if you both believe in Jesus Christ or not. If you do not both believe in Jesus Christ, then this request might be against biblical principles. If that is the case, then the goal should be to pray for both of you to believe in Jesus Christ and receive eternal life. Eternal life is the most important issue.
If you are in a courtship with another believer then we should consider what God's word says about your situation. The Bible warns us not to let sin reign in our lives, including egos, negativity, and disagreements about money. It is mentioned that you should pray that nothing penetrates his mind to come in between us or speak negatively against our relationship. However, we know that temptation will always be there, but we are called to be faithful, and pure.
There hath no temptation taken you but such as man can bear: but God is faithful, who will not allow you to be tempted above that ye are able; but will with the temptation make also the way of escape, that ye may be able to endure it 1 Corinthians 10:13 WEB
The Bible says, "No weapon that is formed against you will prevail." It doesn't say that you will never have weapons formed against you.
No weapon that is formed against you will prevail; and every tongue that riseth against thee in judgment thou shalt condemn. This is the heritage of the servants of Yahweh, and their righteousness which is of me, saith Yahweh. Isaiah 54:17 WEB
We need to be pure, we need to be holy, we need to be righteous and follow the Holy Spirit. If there is anything going on in your courtship that is not pure, righteous or holy, stop it immediately. Any communication should be pure, righteous, and holy. God will not bless relationships that are not pure, righteous and holy.
Finally, we need to note that you have appropriately mentioned the Lord Jesus Christ in your request. We need to have faith in Jesus Christ and His power to act. We need to pray in Jesus' name, as it is only by the name of Jesus that we have access to God. Also, there is no other name by which we can be saved.
Here is our prayer for you:
Dear Heavenly Father,
We come before You in the mighty name of Jesus, seeking Your will for this relationship. First, we pray that both individuals in this relationship believe in Jesus Christ and have a personal relationship with Him. We pray for both individuals to repent and believe in Jesus Christ if this is not the case. We pray that You will soften both of their hearts and remove any ego, pride, or negativity that may be causing division. Help them to communicate purely, righteously, and in a holy manner. Help them to be equally yoked believers. Help them to remember the good times and the love they share, and to work through any disagreements, especially those concerning money.
We pray for faithfulness and purity in their relationship, and we ask You to protect them from any negative influences that may seek to come between them. We declare that no weapon formed against them shall prosper, in Jesus' name. We ask that You guide them according to Your will, and that You help them to grow in love, patience, and kindness toward one another.
We pray this in the name of Jesus Christ, Your Son, our Lord and Savior.
Please consider these principles and scriptures as you move forward in your relationship. Trust in God's timing and His plan for your life. If you need to make changes, be obedient and make changes immediately.
Prayer Focus: God, Thank You for loving me. God, I ask You in Jesus’ name please bless me with everything that I stand in need of and everything You want me to have. 
