We understand your distress and we are here to pray and provide guidance based on biblical principles. First, let's address the issue of curses and the power of words. The Bible tells us that the power of life and death is in the tongue (Proverbs 18:21 WEB). Your father's words may have had a negative impact on your life, but they do not have the final say. God's words and promises are the ultimate truth and authority in your life.
Let's break this curse and rebuke these words in the name of Jesus Christ. Remember, it is only by the name of Jesus that we have access to God. It is also only by belief in Jesus that we are saved. There is no other name by which we can be saved. Notice that the name Jesus Christ, Jesus, or Christ is not mentioned in your request. For any prayer, we need to use the authority of Jesus Christ. This is clear in John 14:6 (WEB): Jesus said to him, "I am the way, the truth, and the life. No one comes to the Father except through me.".
Now, let's pray:
Dear Heavenly Father,
We come before You in the name of Jesus Christ, to break the curse of romantic rejection spoken over this dear person's life. We rebuke the words spoken by her father, and we declare that they have no power over her. We speak life, love, and fulfillment into her situation. Lord, we know that it is not your will that this person is in a constant loveless existence. We pray that You will heal her from the trauma and devastation of past experiences, including the pain of being stood up on her first date.
Father, we ask that You will give her the strength to move forward and not put her life on hold any longer. We pray that You will guide her steps and direct her to a godly spouse, a marriage that honors You, if it is Your will. We know that marriage is a lifelong commitment between a man and a woman, as outlined in the Bible. We pray for a godly husband. We ask for no boyfriend if he is not a godly man. We pray for a courtship if appropriate. We ask for a godly spouse only. We pray for this person to not pursue a relationship that does not align with biblical principles. We rebuke sex outside and before marriage. We rebuke fornication and adultery in Jesus name. We rebuke homosexuality and same sex marriage. We pray for a godly marriage only with another Christian Believer as a spouse. In Your word, You said that it is not good for man to be alone (Genesis 2:18 WEB), and we trust that You have a plan and a purpose for this person's life.
We also pray for healing and acceptance regarding health issues and not being able to have children. We know that You are a loving and compassionate God, and You will provide comfort and peace.
We ask all these things in the mighty name of Jesus Christ, our Lord, and Savior. Amen.
Now, let's address some points from your request. First, it's important to forgive your father for the words he spoke over you. The Bible tells us to forgive as we have been forgiven (Ephesians 4:32 WEB). Forgiveness does not mean what happened is acceptable, it means letting go of the bitterness and leaving justice to God.
Second, it's not God's will for you to live a loveless existence. God wants you to be fulfilled and happy. However, it's crucial to seek God's will in all things, including relationships. Make sure you are seeking a godly spouse (a husband) and not just a boyfriend. Marriage is a lifelong commitment between a man and a woman, as outlined in the Bible.
We encourage you to trust in God's timing and to put your hope in our Lord Jesus Christ. We are confident that He has a plan for you. Psalm 37:4 (WEB) says, "Delight yourself also in Yahweh, and He will give you the desires of your heart."
As far as being left behind by your younger nieces and nephews is concerned, remember that God has a unique path for each of us. What He has for you is specifically designed for you. Trust in His timing and His ways.
Lastly, we want to remind you that God's love is the greatest love you could ever experience. No matter what happens, His love will always be enough to fulfill you. 1 John 4:8 (WEB) says, "He who does not love does not know God, for God is love."
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. 
