Peter was appalled at the idea that Jesus was going to allow Himself to be sacrificed. Peter protested and conveyed what he felt. 

Jesus rebuked, put Peter in his place for placing his desires, the desires of man, before the desires of God. Basically, God/Jesus, wanted the sacrifice, so that those who follow shall be saved. 

The term Satan, means “to oppose” “to protest” “to object” “to block” in Hebrew and Aramaic. 

Peter was not Satan, the devil. Peter was not possessed by Satan, the devil.

Jesus referred to Peter as Satan, because Peter objected and protested against the desires of God: Jesus’ upcoming sacrifice. 

I looked through the other answers and it shows, that many Christians act like Peter did, by putting their selfish desires before what the bible is supposed to be teaching them. 

They’ve even gone on to accuse Simon Peter of being the head of the “satanic” Catholic Church. 

These idiots have grossly misinterpreted the words that Jesus said; and then, as a result, opposed, protested and accused...that’s Satan. 

😉

Because Jesus understood what was about to happen. The hour approached when he would die as a ransom sacrifice and prove the Devil a liar. The apostle Peter took him aside and said: “Be kind to yourself, Lord; you will not have this happen to you at all.” Jesus’ reply to Peter was firm: “Get behind me, Satan!” (Matt. 16:22, 23) At that critical juncture in human history, it was not a time for Jesus to “be kind” to himself. Relaxing his guard would have been precisely what Satan wanted him to do.

The answer lies in the original Greek. The word is satanas and it can refer to Satan himself AND/OR a Satan-like man.

You know what? I find it very strange that a potato reads the word of God, why don't you convert to God?

True Christians can help you to pray to God, and you will see that He will manifest Himself to you for your salvation!

The apostle Peter, at that time, at that time, was under pressure in his mind of Satan's suggestion against the Lord, therefore, Jesus did not directly say the phrase to Peter, go away from me, Satan, but it was addressed to Satan in Pietro's mind.

It is clear that Peter, reflecting on what he had said, asked Jesus for forgiveness, and he was forgiven! Is that clear?

AT THAT MOMENT HE WAS LISTENING TO THE ADVERSARY AND NOT THE THINGS OF FATHER GOD.

Hhhhhmmmm and that's the man Catholics built their Church on, interesting

Jesus sometime used hyperbole to indicate displeasure or incredibility. Here, Jesus is merely expressing his surprise at how Peter, after some three years of instruction, could be so obtuse, as to not understand the requirements of Jesus' mission and eventually, Peter's as well. Jesus might just as well have called Peter, "hey, stupid".

Jesus made a distinction between thoughts that originate with God and thoughts that originate with this world under Satan’s control. 1 John 5:19

Peter echoed the self-sparing attitude of the world. But Jesus knew that his Father’s thinking was different. He knew that God wanted him to brace himself for the suffering and death that awaited him.

In his reply to Peter, Jesus clearly rejected the world’s thinking in favor of God’s.

Jesus rebuked him because Peter had on that occasion allowed himself to be influenced by Satan. Peter had not God’s mind, but that of men.

Because He knew that the satanic Roman Catholic cult would claim that he was their first Pope.