The Song of Songs, the dialogue between King Solomon and his bride, is a celebration of the romantic and physical love between a husband and wife.It shows that God desires that they enjoy the blessings of the union He created.1 Jn.3: 1 says, "How great is the love the Father has lavished on us that we should be called children of God! " Gal.5: 13 says, “Rather serve one another in love.” Heb.10: 24 says, “Let us consider how we may spur one another on toward love and good deeds.” God desires that we serve one another in love by giving of ourselves to help each other grow in Christ as fellow-believers.This love is based on our relationship with Christ and is not dependent on feelings we may or may not have for a fellow-believer.
When a Christian marries he or she is making a commitment to fulfill the responsibility God ordains for the husband or wife to fulfill.
Prov.17: 17 says, “A friend loves at all times.” Prov.18: 24 says, “There is a friend that sticks closer than a brother.” Prov.27: 6 says, “When a friend rebukes you, that rebuke can be trusted.” Prov.27: 9 says, “The pleasantness of having a friend springs from his earnest counsel.” Prov.27: 10 says, “Do not forsake your friend.” These verses bring out the fact that the Lord blesses friendship and encourages us to develop them.
Friendship involves three foundational elements, commitment to fulfill the responsibility of a friend, care and concern for the welfare of your friend, and affection.
Brother-sister relationships in Christ involve two foundational elements, commitment to fulfill the responsibility of a fellow-believer in Christ and care and concern a believer is to have toward other believers.
It can involve affection as we work together in Christ, but affection is not a necessary element.