Here’s an easy to read book on prayer, that covers different types of prayer and how to deal with various problems with praying. It was written by a Jesuit and is used at some seminaries for intro to prayer class…
There is a “look inside” at amazon:
Mark Thibodeaux S.J. (Author)
On “dryness”
CHAPTER TWELVE
When I’m Bored With God
Dealing With Dryness
Orientation The previous chapter explained that I shouldn’t worry about distractions that come and go in my prayer because they ultimately have little lasting impact. But at some point in my prayer life, I may go through a longer and much more difficult period, wherein my prayer simply dries up. I will receive no graces to enrich my life—no delightful and inspiring treasures floating to the surface. Instead, every prayer time will be filled with restlessness and/or boredom. The problem with dryness is not that something bad happens in prayer, but rather that nothing is happening at all. I just sit there by myself with no sign of the presence of God.
The vast majority of beginners quit praying at this point. Most do not consciously choose to stop praying; they just gradually pray a little less and a little less until one day, they look back and realize that they hardly pray at all anymore. Very seldom do they realize or admit that the reason they quit was because they got bored and lost interest. After all, who would admit—even to themselves—that they were bored with God? Instead, they simply convince themselves that they are just too busy right now and that they will return to it when things slow down (which never happens).
What is tragic about this problem is that this moment of dryness may well be the most momentous of my prayer life. Often, it is at this moment that God is inviting me to a much deeper and more mature relationship with him. Most beginners don’t realize how close they are to something really big. All they know is the emptiness of the experience.
There are three possible causes of the experience of dryness: (1) It could be an external problem; (2) it could be a deeper spiritual problem; or (3) it could be God calling me to a very special period of growth, sometimes called the desert experience. If I have a spiritual director/mentor or a good friend with whom I can share my prayer experiences, the two of us can explore these possibilities together. It is difficult to figure them out on my own because the negative emotions that accompany this dry period might hamper my objectivity. Someone on the outside of the dryness will be able to help me keep the issues in proper perspective.
Thibodeaux S.J., Mark (2011-08-09). Armchair Mystic: Easing into Contemplative Prayer (Kindle Locations 2652-2676). St. Anthony Messenger Press. Kindle Edition.