Answer:
I never said you shouldn’t try to bring them to God. Because you should always be trying to witness and bring non believers to Christ. But you should do that outside of a romantic-like relationship. Be their friend, be their support. Bring them to church, share your testimony. But you can do all of that without being their boyfriend/girlfriend. God very well may have put them in your life so you can help them come to Him, but He wants you to help them first, and when you guys are on the same page spiritually, then you can date. But until they accept God as their Savior, you should not enter a dating relationship with them.