prayer is all good and fine, but to strengthen your relationship with God, you also need to pray by just talking with God,
prayer is “the lifting of our hearts and our minds to God”, so it should come from your heart,
if your heart is just not in it, then you might just need to try and know God better, which you can do by reading about Him in the bible, esspeically of course His passion, and then there are many other great books on God, both His life on earth and His life in us, Fulton J. Sheen is an excellent choice for learning about God, he explains things in such a simple yet very deep way, my two favorite of his are “Life of Christ”, and “The Seven Last Words”.
it’s not just who God is that we learn to love Him by, it is also everything He does for us and how much He truly loves us,
it just takes alot of quiet time alone with God, speaking to Him about whatever is on your mind, and although He doesn’t necessarily speak back in words, He does speak to us in our hearts, or inspires us somehow, perhaps by a thought just popping into our heads, but it’s not like how you and i can talk back and forth, it’s much more intimate then that…
here is a really great little book to help with meditating on the mysteries of the rosary -
fraternitypublications.com/frrogaofourl.html
i think that will help you alot, it has some very beautiful explanations and meditations, and they really get your mind deep in thought.
well, i hope this helps, take care.