This is why I asked if you were (or had ever been) a Jehovah's Witness. JW's and other fringe groups will find one or two verses that out of context seem to be stating something that they really are not, and will hang onto them tighter than a pit bull when it bites down.
There are many number of verses, which you have already been shown, that clearly show that Jesus Christ is equal with God. For example:
John 5:18
Therefore the Jews sought the more to kill him, because he not only had broken the sabbath, but said also that God was his Father, making himself equal with God.
Your interpretation of John 17:3 and the plain meaning of John 5:18 (as well as a number of other verses) cannot both be true. One is right and the other is wrong, or they are both wrong. They both can't be right.
Yes, the Father is the one true God. The Son of God is equal to and is part of the Father, and is just as much the one true God as the Father. Nothing in John 17:3 says otherwise.
This may seem like a contradiction to our human minds, but that is only because we do not have the ability to comprehend the fulness of who God is beyond our limited perspective. Once we leave these jars of clay and enter into eternity, these things will all make sense. But, the problem is, we need to be reconciled to God in this lifetime. If we are not, there is no second chance, once judgement day comes, it's game over.
The scriptures plainly teach that Jesus Christ is equal with the Father, and is part of one being, the Godhead, who alone is worthy of all honor, glory, and praise. To deny this is to count yourself not worthy of salvation, to willingly cut yourself off from the true Vine (Jesus) and to set yourself up for destruction by fire. No one who denies that Jesus Christ is LORD will enter into salvation. Some day, every creature will bow the knee and declare that Jesus Christ is LORD to the glory of the Father, it's best to do this ahead of that day, and to do so willingly.
Psalm 2
11 Serve the LORD with fear, and rejoice with trembling. 12 Kiss the Son, lest he be angry, and ye perish from the way, when his wrath is kindled but a little. Blessed [are] all they that put their trust in him.
Travis