do not be unequally yoked
I would think you would not want to get very involved with someone who does not help you to grow in Jesus. You would want to share with various others who help us grow and mature in how God has us loving, and this would not mean relating only with some one person who is not even a Christian. We can get charmed, though, by someone's smart talking, how they act and tone their voices, then suppose we are in real love with the person. But we might really be in love with what we want to use the person to get. People of the world have learned the "you can use me" act > talking smart so we think we can trust someone to give us what we want, acting charming so we feel they will be nice about it.
Bad company corrupts good character.
But, then, our good example can help others to become how Jesus wants. So, with each person, stay with good example. And do not accept less than others joining us >
"nor as being lords over those entrusted to you, but being examples to the flock." (1 Peter 5:3)
Simply, offer good example and do not go along with what isn't. And someone else will choose if he or she wants to stay with us. I think part of our Christian example, in seeking a marriage person, is we share with various other Christians who are obviously helping us be corrected by God > Hebrews 12:4-11 > and encourage anyone to join us; and do not isolate ourselves in dating someone who will not share in our family prayer and scripture study and helping each other to gain God's correction.
Isn't that what being boyfriend and girlfriend is? Isn't it a form of dating and getting to know each other further with the possibility of marriage?
I think we do well to share with ones of interest to us, but while in family sharing with other Christians, since God our Father is about family, not isolation relating with only one other and a favorite person whom we don't even really know > "For if you love those who love you, what reward have you?" (in Matthew 5:46)
It seems a number of daters turned married find out they did not really get to know each other . . . often, I think, while they isolated themselves mainly only with one another, and have not first found out with God how to truly get to know someone and how to relate > Ephesians 4:2-3 with Ephesians 4:31- Ephesians 5:2.
Also, I think there is such a thing as a Christian celibate covenant companionship correction committed couple who help each other and others to learn to relate with God and learn how to relate in His love with any and all people.