The Dark Night seriously involves the purification of the emotions.
That is one of the main points of the Dark Night.
One no longer desires to be religious, or holy.
One no longer "feels" the Presence of God or "feels" like one loves God.
These false feelings must be struck dead.
Feelings belie faith and in the Dark Night, one lives in faith only.
That is the point.
To live by faith and in the will is to really love God.
No desires, no consolations, not a moment of "fun"....
But, if one perseveres in faith, one will encounter God.
The ego has to die.