We understand your longing for companionship and love, but we want to guide you according to biblical principles and encourage you to adjust your prayer request around Marriage. The Bible tells us that "God is love" (1 John 4:8 WEB), and He cares deeply about our desires and needs. However, it's important to approach this subject in a way that honors God and aligns with His word.
First, let's consider the term "boyfriend." In the Bible we see courtship for the purpose of marriage, we do not see boyfriends or girlfriends. Biblical relationships are focused on marriage, and all that you seek should be towards finding a godly Christian man to be your husband. This begins with courtship where you seek to help each other strengthen each others faith and learn about each other. However, we must remember that God's design for marriage is between a man and a woman (Genesis 2:24 WEB), and that sexual intimacy is reserved for marriage (1 Corinthians 7:2 WEB). Also, this relationship should be only with and Christian.
It's also crucial to remember that God's timing is perfect. You mentioned that you're almost 50 years old and have never had a boyfriend, but God may have protected you from relationships that were not His best for you. Trust that He knows the desires of your heart and has a plan for your life (Jeremiah 29:11 WEB). God honors marriage to honor God, You should never think of marriage or courtship like the world does. Remember, that it is only in the name of Jesus that we can be saved and have an eternal relationship with God.
Instead of focusing on finding a boyfriend please adjust pray for this to finding a courtship towards marriage, let's pray for God's will in your life and for Him to prepare you for a godly marriage if that's His plan for you. Here's a prayer based on your request:
Dear Heavenly Father, we came to you today and ask You to reveal Your will and guide our sister in Jesus. Father God, if it aligns with your will, we pray that you would begin a courtship with a godly Christian husband towards marriage. We pray that you would continue to strengthen and comfort her. Father God we ask that each of us would stay in the Word and improved our relationship with you and that we would stay ready and pray about your will in courtship and marriage. Always remembering the teaching of Paul and Moses one man and one woman for a lifetime. If it be Your will, prepare her for a godly marriage, in which she can honor and serve You alongside her husband. Help her to trust in Your timing and to never compromise her faith or values. We ask this in Jesus' name, Amen and continue to renew Your mind with what is good and acceptable and perfect and that we can understand all things that are good and be obedient to You.
We will pray for God's will and that you will keep your prayer and mind in the word, in Jesus' name and that God will bless you with a husband. Remember that Jesus is the most important relationship in your life and that if marriage be in God's will, God will bless you with a husband instead of thinking about boyfriends. Never think of marriage as the world does, and that is a courtship to one man. Further to help you further your understanding, a verse to consider is Hebrews 13:4 (WEB), "Let marriage be held in honor among all, and let the bed be undefiled: but God will judge the sexually immoral and adulterers."
Remember looking for a marriage partner begins with courtship towards marriage.