If i may add and say ... The reason why Jesus called Father his God, and prayed to God the Father is very simple ... He was fully human, and fully God. He was God incarnate in the human flesh.
John 1:14 - "...And the Word was made FLESH, and dwelt among us"
John 1:1 refers to Jesus was the Word, and John 1:1 basically says that Jesus is God and has existed since the beginning.
Showing the humanity of Jesus in no way is a logical or a valid argument to show that Jesus wasn't a God, because Christians know Jesus eat, slept, wept, was tired etc etc, Jesus was fully man and fully God. So showing Jesus's humanity isn't a valid argument against the deity of Jesus.