Ok let me say.... God is One! Why would One pray to One? Pray to yourself? NO! What did He pray for then? He is God! Why pray to Father if you are Son, and One! This is confusing! That is why muslims think we are crazy... 1+1+1=1. but 1x1x1=1. But do not math the Word so let us use the Word to teach us!
Let us read the prayer He prayed to Himself! Or did He? Emagine a Bible without John 17! How would we know that it is the Father's will to UNITE us in Christ Jesus, while we are here on earth if John 17 was not in the Word? And remember this was not the only time Jesus went into isolation to pray to the Father. So go on read the whole of John 17 now! And all the other prayers was also for US!
Remember one thing. John 10:30 Jesus and His Father are ONE! Ok God cannot die! So he had to occupy something that can! He generated a baby in a virgin, to claim "unhuman" existance. But the Baby would need a soul, and did get one, as the soul is in the blood, and when the Spirit in the Baby was added, He was made in the image of God. Wow! Like Adam! But again something made Him "not human", that was the Holy Spirit! Jesus was born of God, because Jesus recieved a Spirit that cannot sin. God is the Holy Spirit! God was and is and always will be Spirit!
This flesh and soul called Jesus Christ, will be under the Personal command of God Himself! That is why Jesus never sinned! He was moved by the Holy Spirit. The Spirit is what makes Jesus the Man, and God the Spirit ONE! And it is the Same Spirit that makes us One with eachother and God.
John 17, read it deep and slow! miss nothing it is Very GOOD!