I am amazed that you ignore that He was talking about the Holy Spirit as the Comforter and then said "I will not leave you comfortless.
Perhaps you didn't know that a "paracletos" is not a person who comforts others. The "paracletos" is more like an
advocate, a legal person who is trained and skilled in the art of making an argument for or against a particular social issue or they are hired to make an argument for or against a legal opponent.
With that in view, John the Apostle refers to Jesus as our "paracletos", the one who will advocate for us in the heavenly court.
1John 2:1-2 My little children, I am writing these things to you so that you may not sin. And if anyone sins, we have an Advocate with the Father, Jesus Christ the righteous; 2 and He Himself is the propitiation for our sins; and not for ours only, but also for those of the whole world.
Jesus serves as our advocate for forgiveness, justification, and salvation. However, rather than being our Advocate, Jesus sent the Holy Spirit to be his advocate. As stated, the Holy Spirit will convict the world regarding sin, judgment, and righteousness. In this role, the Holy Spirit supports Jesus and His Apostles, who are spreading the good news throughout the known world.
I will come to you", showing that He is One with the Holy Spirit. And also One with the Father because He also said "If a man love me, he will keep my words: and my Father will love him, and we will come unto him, and make our abode with him.".
Jesus was not a Platonist, so when he says that he and the Father are one, he is referring to the idea that he and the Father teach the same things and share the same attitudes and commitments. They are one in purpose, aims, goals, thinking, desires, and commitments. He isn't saying that he and the Father are of the same nature.
The Upper Room discourse undermines your view that Jesus is omnipresent. If Jesus was omnipresent as you suggest, he wouldn't need to comfort his disciples concerning his absence. He wouldn't warn them about obeying him in his absence. He wouldn't warn them to treat their fellow servants well in his absence. And he certainly wouldn't need to send ANOTHER Paracletos to help them with their mission, IN HIS ABSENCE.
The sentence you quoted, taken out of context, is part of a passage where Jesus warns his disciples about his impending departure. He is going away, and he knows how stressful this will be for them. The verse is found in chapter 14 of John's gospel.
John 14:1-3 Do not let your heart be troubled; believe in God, believe also in Me. In My Father’s house are many dwelling places; if it were not so, I would have told you; for I go to prepare a place for you. If I go and prepare a place for you, I will come again and receive you to Myself, that where I am, there you may be also.
In this passage, our Lord speaks about dwelling places that are found in His Father's house. Jesus is going to His Father’s house to prepare these dwelling places for His disciples. He comforts them by promising to return and receive them. His intention is to bring them to the dwelling places He has prepared, so that they may be there with Him as well.
This addresses your incorrect belief that Jesus is omnipresent. The promise he made to his disciples is clearly locative: first, Jesus departs, and then he returns. Movement only makes sense for beings that are not present everywhere. Since Jesus is not omnipresent, he must leave to prepare the dwelling places, and he must also return to gather them.
Jesus often speaks cryptically, and so his disciples often ask for clarification.
John 14:22-25 Judas (not Iscariot) *said to Him, “Lord, what then has happened that You are going to disclose Yourself to us and not to the world?” Jesus answered and said to him, “If anyone loves Me, he will keep My word; and My Father will love him, and We will come to him and make Our abode with him. He who does not love Me does not keep My words; and the word which you hear is not Mine, but the Father’s who sent Me.
In this passage, the Lord speaks about a time when He will reveal Himself to His disciples but not to the rest of the world. At that moment, they were unaware that Jesus would be crucified, buried in a tomb, and then rise again from the grave. He kept his word that he wouldn't reveal himself to the world, but only to them. After His resurrection, Jesus appeared to a limited number of people, including several women, two individuals on the road to Emmaus, and the eleven disciples. Additionally, according to Paul, He later appeared to about 500 other witnesses. But he didn't reveal himself to the world.
That role will be given to the Eleven and Paul, working with the Holy Spirit. Eventually, as Jesus said earlier in the chapter, he will return to gather his disciples and take them into his fathers' house, where he has prepared dwelling places for them. That is where they will make their abode with him and his Father.
You have no excuse for not acknowledging that Jesus is God.
I do acknowledge that Jesus is God. I don't affirm your belief that Jesus must be divine by nature to be God.