This liking involves a "friendship kind of" affection based often on personality and common likes and interests.
A second kind of relationship is “brother-sister in Christ.” If we have accepted Christ as our Savior we have become children of God.
Each of these three relationships have two common characteristics, a commitment to the responsibilities of that particular kind of relationship and a genuine care and concern for the other person in a particular kind of relationship.
Friendship and marriage have a third characteristic - affection and attraction, although the nature of the affection and attraction is different.
Song of Songs -11 says "How delightful is your love my sister, my bride!
How much more pleasing is your love than wine, and the fragrance of your perfume than any spice." Only in marriage may a man and woman enjoy expressing their romantic and sexual desires toward each other.
Friendship involves three foundational elements, commitment to fulfill the responsibility of a friend, care and concern for the welfare of your friend, and affection.