It happens in marriage:
…when we realize we’ve married someone selfish, we discard the dream and become cynical about the possibility of love. We set ourselves up for failure by overloading love with far more than it can bear. Married love as a source of life crashes on the rocks of human depravity. … But love and relationships were never meant to be the center. Love is not god. God is love.
Paul Miller, A Loving Life, pg 38.
And it shows up in the Bible:
St John’s saying that God is love has long been balanced in my mind against the remark of a modern author (M. Denis de Rougemont) that “love ceases to be a demon only when he ceases to be a god”; which of course can be re-stated in the form “[love] begins to be a demon the moment he begins to be a god.” This balance seems to me an indispensable safeguard. If we ignore it the truth that God is love may slyly come to mean for us the converse, that love is God.
C.S. Lewis, The Four Loves, pg 6-7.