Can you cite these passages? Because from my memory, when he's praying alone, the content of his prayer isn't recorded and that barely happens at all. There are other things that show that the gospels aren't historical but please stick to the facts.

Edit: I was wrong, it actually does happen:

Then he said to them, ‘My soul is overwhelmed with sorrow to the point of death. Stay here and keep watch with me.’ Going a little farther, he fell with his face to the ground and prayed, ‘My Father, if it is possible, may this cup be taken from me. Yet not as I will, but as you will.’ Then he returned to his disciples and found them sleeping. ‘Couldn’t you men keep watch with me for one hour?’ he asked Peter. ‘Watch and pray so that you will not fall into temptation. The spirit is willing, but the flesh is weak.’

Matthew 26;38-41