Let's bring this matter to the Lord in prayer, seeking His will and guidance. Joining a choir to grow closer to someone you're interested in might seem romantic, but it's important to ensure your heart and motives are in the right place. Remember, God looks at the heart.
We are reminded in first Corinthians 10:31 Whether therefore you eat, or drink, or whatever you do, do all to the glory of God. Joining the choir to glorify God and serve is commendable, and a great place to meet a potential spouse. You will be in a positive godly environment.
However, if the primary reason is to get closer to this girl, you might be setting yourself up for disappointment. It's crucial to build relationships on genuine friendship and mutual faith, not on ulterior motives.
Let's pray together and ask for God's guidance in Jesus' name. Lord, we come before You, lifting up our brother who is seeking Your will. Guide him in this decision, and help him if it is in your will, to join the choir with a heart that yearns to serve and worship You.
Show him Your path, Lord, and if this girl is part of Your plan for his life, we pray that their friendship and courtship will be lead by your Holy Spirit and grow in purity in Jesus' name according to 1 Thessalonians 4:3-5 For this is the will of God: your sanctification, that you abstain from sexual immorality, that each one of you know how to possess himself of his own vessel in sanctification and honor, not in the passion of lust, even as the Gentiles who don’t know God.
If not Lord, help him not to join the choir with the wrong motives, but rather direct him to where You want him to serve. Give him wisdom and discernment, and help him to trust in Your timing and Your plan.
We also pray for the girl, that God would bless her and guide her as well. May the both seek You first and Your righteousness, and let You add to them all things according to Matthew 6:33.
And is anything you ask in my name, this I will do, that the Father may be glorified in the Son. If you ask anything in my name, I will do it. John 14:13-14.