Love in its unadulterated form comes from God because God is love.
From 1Peter 4:8,we are expected to give a 100% in relationships. Giving anything less results for a not so great relationship. We don't want okay relationships, because that will cause us to settle and relationships are too important for us to settle. People don't change, they expand in relationships. In relationships, the more you focus on yourself, the less you focus on the relationship. Marriage is an act of faith. From Ecclesiastes 4:10, we would also see that God is love, we’re made in his image, therefore we’re made in the image of love.
We must realize that God is not against relationships because he himself is the Personification of relationship— God the Father, the Son and the Holy Spirit.
God understands the importance of a relationship. Thus, he stated in Genesis 2:18, "It is not good for a man to be alone..." Every product has a principle of usage AKA, the prescription. For whatever is produced by a manufacturer, the best principle to apply in its usage is the manufacturer's prescription. Love is the standard thing in a relationship; Every relationship ever founded began on a reason to love.