I would add that God was interested in finding Isaac the "right" girl and indicated that she would be the one who offerred to water his camels which is exactly what Rebecca did. Jacob, later called Israel, was so in love with Rachel that he worked a total of 14 years for her father, who first tricked him into marrying Leah, but later gave him Rachel as well. And what about the patriarch Abraham. His wife Sarah's name meant princess. No one can argue that Song of Solomon is not one of the most romantic and poetic books in the Bible. And Jesus uses the analogy of the groom returning for his beloved bride to describe his second coming.
If you feel called to write Christian romance, do not be ashamed that you are not writing deep theology or delving into erudite explication of Scripture. Write from a basis of knowledge of God's word, experience, and heartfelt emotion.