I won't waste my time answering this question but i will help you with your English: If God really loves us and He knows what is best for us, what's the use in praying?

Praying is the act of love to God

He wants us to ask Him by ourselves.

Prayer is some kind of contact and comunication with Allah . It is like a charger for our spritual battery to live with high moral state . And also it is like a filter to clean our souls from sins . Also it is a duty to worship allah through it and reflect our obediance to him . like if u r in a desert feel thirsty the prayer is the only source of water , after u drink what will u feel ??

Prayer is a part of your relationship when following God. You first need a relationship with God and want to follow God before he can act in your life. Before he can act in your life, you need to let him act in your life. He loves us. However, do we love him well enough to follow him when he tells us what is best for us? You must show that you are very comfortable in coming to God with your needs, concerns, and any issues in your life. God wants us to rely on him like that. You must have a relationship with God, otherwise God's intersession of what is best for us will be in vain if we do not intend to put to use what he knows is best. God loves the devil and knows what is best for the devil. The devil knows God, believes in God, but wants to neither follow nor listen to God. The Devil does not love God. Without a submissively growing relationship with God the Father, God the Son, God the Holy Spirit, without loving God, God cannot act in your life knowing what is best for you, if you do not listen, believe, nor follow what God says is best.. The Bible says, "This is the confidence we have in approaching God: that if we ask anything according to his will, he hears us."[1 John 5:14] "For the eyes of the Lord are on the righteous and his ears are attentive to their prayer..."[1 Peter 3:12] The question then is, do we hear him and obey him when he responds to what is best for us? http://www.biblegateway.com/passage/?search=1%20Peter%203:12%20;&version=49; http://www.ask.com/bar?q=if+god+really+loves+us+and+He+know+what+the+best+for+us%2Cthen+what%27s+are+prays+was+for%3F&page=1&qsrc=121&zoom=%3CKW%3EPraying%3C%2FKW%3E+Hands|%3CKW%3EPraying%3C%2FKW%3E+Each+Day|&ab=0&u=http%3A%2F%2Fwww.everystudent.com%2Fwires%2Fprayers.html