God is our Father and other Christians are our brothers and sisters in Christ. Our Father deeply loves and desires that we show love to each other, that is seek each other's highest spiritual good.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.It also involves the joy of romantic desire/attraction and intimacy and sexual desire/attraction and intimacy.
One kind of relationship the Bible describes is friendship.
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.
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.
Of these three relationships, the Scriptures only speak of romantic attraction and desire being expressed in marriage.