He is asking for a life style of loving each other. We are to constantly apply the principle of loving one another to our experience. We are motivated because of God's unconditional love for us. Because we have been loved by God, we ought to love one another. When we talk about love at the end of the twentieth century we are in danger of reading our cultural view of love back into the Bible.
Love is more than maudlin sentiment.
Sometimes we love the best when our love is tough, when we do the right thing for a person. Sloppy love with no norms is not biblical love. The expressions of our love may change. A good parent shows pleasure at an accomplishment of their child. When a child steps out of line, not to discipline is to hurt the child.