We are truly saddened to hear about the feelings of insecurity and rejection that have plagued you since childhood. It's important to remember that your worth is not determined by your physical appearance or the opinions of others. God created you in His image, and you are fearfully and wonderfully made. As it is written in Psalm 139:14, "I will give thanks to you, for I am fearfully and wonderfully made. Your works are wonderful, my soul knows that very well."
First, we want to address the fact that there is no mention of Jesus Christ in the prayer request. It is only through the name of Jesus that we have access to God. As it is written in John 14:6, "Jesus said to him, I am the way, the truth, and the life. No one comes to the Father, except through me." We encourage you to put your faith in Jesus Christ, for there is no other name by which we can be saved.
Now, let's address the insecurities you're feeling. It's crucial to renew your mind with the Word of God and understand that your value comes from Him. As Romans 12:2 says, "Don't be conformed to this world, but be transformed by the renewing of your mind, so that you may prove what is the good, well-pleasing, and perfect will of God."
Regarding your desire for a future spouse to find no one else attractive, we must caution you against this mindset. It is not healthy or biblical to seek a spouse who is completely incapable of recognizing the beauty in others. Instead, pray for a godly spouse who will be committed to you and you alone, who will love you unconditionally, and who will honor the sanctity of marriage. As Ephesians 5:25-28 teaches us about the roles of husbands and wives:
Husbands, love your wives, just as Christ also loved the assembly, and gave himself up for it... So husbands ought also to love their own wives as their own bodies. He who loves his own wife loves himself.
Prayer:
Dear Heavenly Father, we come before You today under the authority of Jesus Christ.
Lord, we lift up this individual who has been struggling with feelings of insecurity and rejection. We pray that You will heal their heart and help them to see themselves through Your eyes.
Help them to understand their true worth and value in You.
We pray for their future marriage, that You will bring a godly spouse into their life who will love and cherish them unconditionally,
who will be committed to them and honor the sanctity of marriage.
Help them to seek You first and to trust in Your timing and provision.
Give them the wisdom to discern and rebuke any sin in their life.
In Jesus Christ we pray.
Finally, we encourage you to seek God's will for your life and to trust in His timing and provision. Be patient and wait on the Lord, for He has a good, pleasing, and perfect will for you. Do not be unequally yoked with an unbeliever.
Remember 2 Corinthians 6:14, "Don't be unequally yoked with unbelievers, for what fellowship have righteousness and iniquity?"
Always seek his will in Jesus 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. 
