I think worship is part of it. I also think that loving him and having a relationship with him is important too. But I don’t think that this really explains the ‘why’ part.
I think a better answer might be that it was good to do so. By creating man, God was essentially sharing himself with others.
We read in the creation account the following passage…
[quote=Genesis 2:18]The LORD God said, “It is not good for the man to be alone. I will make a helper suitable for him.”
And, later on, we read the following passage in the Christian Scriptures…
[quote]“For this reason a man will leave his father and mother and be united to his wife, and the two will become one flesh.”
This is a profound mystery—but I am talking about Christ and the church. However, each one of you also must love his wife as he loves himself, and the wife must respect her husband.
So if woman created in relation to man gives any indication of God’s motives for humanity created in relationship to God, then it may be said that God was lonely in a sense too.
If so, although perfect from eternity, just as it was not good for Adam to be alone and God created man for woman, it might also be found that it was not good for God to be alone and God therefore created humanity for God-- to be his bride so to speak.
Indeed, in the marriage supper of the lamb we read…
[quote=Revelation 21:2]I saw the Holy City, the new Jerusalem, coming down out of heaven from God, prepared as a bride beautifully dressed for her husband.