John 17 (the entire chapter)
I'm going to paraphrase most of it because you already know what it says seeing you are clearly familiar with your bible.
Basically Jesus is praying to God right? and he says that he wants his disciples to be one in him just as God is in him and he in god. So if the trinity is true he wants his disciples to Join the trinity.
That they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us: that the world may believe that thou hast sent me.
Also in ch. 1 John says no one has seen god, but If Jesus is God than they have. Also God cannot be tempted, Jesus was. God cannot die, Jesus did for at least 3 days. (This next section comes fro different parts in Hebrews) If Jesus was God than he couldn't have sinned and the idea that we can relate with Jesus because he was tempted in every way we were is gone because he couldn't sin so there is no relation. Jesus partook in the same flesh and blood that we have right? That means Jesus had the same fleshly nature that we have. Our nature is to sin, just like his was. He overcame it though, which is what made him perfect through sufferings.
Also the general concept of Jesus praying to God literally makes no sense if Jesus is God.
Jesus sits at the right side of God, not in the same spot as God, because they are different.