In a book on the “lost language of lament” Michael Card makes the following connection between really loving one another and lament.

“Our failure to lament also cuts us off from each other. If you and I are to know one another in a deep way, we must not only share our hurts, anger, and disappointments with each other (which we often do), we must also lament them together before the God who hears and is moved by our tears. Only then does our sharing become truly redemptive in character. The degree to which I am willing to enter into the suffering of another person reveals the level of my commitment and love for them. If I am not interested in your hurts, I am not really interested in you. Neither am I willing to suffer to know you or to be known by you. Jesus’ example makes these truths come alive in our hearts. He is the One who suffered to know us, who then suffered for us on the cross. In all this, He revealed the hesed (loving-kindness) of His Father.”
From A Sacred Sorrow, p. 29.