Paano mo malalaman na nagkakatotoo ung prayer... Maybe, just pray for God's discernment? When your prayer is answered, everything in your surroundings/environment will seem to come to alignment... like when you pray that you will meet someone, you will just meet someone out of nowhere... then, you will know in your heart that it is what you have been praying for... then, you will trust that it is God's answer to your prayers... but you do not stop praying, right? because you still have to discern if it is indeed God's will for you...
Ano ang use ng prayer... I was reading a small book "Steps to Christ" by Ellen G. White. I gave it to someone in the church so I can not quote it in here now but it explains that it is not God who needs our prayer... but that when we pray, we are the ones being elevated into God... or should I say, we are being elevated into God's presence...
I hope I was able to answer your question...
I don't come online very often... I hope you understand...