It can involve affection as we work together in Christ, but affection is not a necessary element.
We are commanded in the Scriptures to show love to all believers, but we are not commanded to make all believers our friends.
It shows that God desires that they enjoy the blessings of the union He created.
Song of Songs 1:2 says “Let him kiss me with the kisses of his mouth, for your love is more delightful than wine.” Husbands and wives are to rejoice in each other’s love both romantically and sexually.
Also, in our culture, through "dating" people will often find a life partner and marry.
How men and women view a "date" and "dating" can have a profound effect on their future.
It involves coming together into a permanent bond of unity.
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.
A third relationship God describes in the Bible is marriage.
Marriage is a relationship between a man and a woman that binds them together for life.
It also involves the joy of romantic desire/attraction and intimacy and sexual desire/attraction and intimacy.