The Lord God said, “It is not good for the man to be alone. I will make a helper suitable for him.”

Geneses 2:4-25
Then the Lord God formed a man from the dust of the ground and breathed into his nostrils the breath of life, and the man became a living being.
The Lord God took the man and put him in the Garden of Eden to work it and take care of it. And the Lord God commanded the man, “You are free to eat from any tree in the garden; but you must not eat from the tree of the knowledge of good and evil, for when you eat from it you will certainly die.”
It is not good for the man to be alone. I will make a helper suitable for him. 
Then the Lord God made a woman from the rib he had taken out of the man, and he brought her to the man.
The man said, This is now bone of my bones and flesh of my flesh; she shall be called ‘woman,’ for she was taken out of man.
If the world God made was good, how did it get to be the way it is now? 
This second story, after the creation, accounts for the bad as well as the good in our world. It focusses on the first two human beings and their relationship with God. Significantly, God ow has a different name. In the first story, he was Elohim, God the Creator, the one High God. Now he is Yahweh Elohim, the personal name by which he can be known.
Adam in Hebrew is both a personal name and a word for 'mankind'. God forms the first human being and plants for him a garden in Eden in the east. But neither birds nor animals provide the companionship man needs, and he is not made for a solitary, self-sufficient life. So God creates woman, who shares man's own nature. Here is the ideal partner. 'This one at last is born from my bones, flesh from my flesh' cries Adam in delight, giving us the first lines of poetry in the Bible. These two are literally 'made for one another. They are naked, totally open to one another. And this is right. It will never be quite the same again.
In 2:24 the editor reinforces the point true marriage is a unique and exclusive relationship.
Why?
The Lord God said, “It is not good for the man to be alone. I will make a helper suitable for him.” This is the reason God made a woman for Adam, to be a helper of man. And there is a close relationship between them. 
This is bone of my bones and flesh of my flesh, so they should love each other.
If the word God made was good, for God gives man the right to choice, Man can choose the way to love God or not. God likes man is a living being with real love.
How?
This is an account of God's creation, everything is good. Man and woman is the helper to each other.