Maybe you should try to read the quran.. God doesn't need us he says that himself in the quran ?
We need him.. Worshipping him is a way of remembrance. You must remember god so he will remember you and have mercy upon you the day you are judged for your actions.
"And He it is Who has created the heavens and the earth in six Days and His Throne was on the water, that He might try you, which of you is the best in deeds. But if you were to say to them: "You shall indeed be raised up after death," those who disbelieve would be sure to say, "This is nothing but obvious magic."
He's the One) Who has created death and life, so He may test you which of you is best in deed. And He is the All-Mighty, the Oft-Forgiving;
(He's the One) Who has created the seven heavens one above another, you can see no fault in the creations of the Most Beneficent. Then look again: "Can you see any rifts?"
Then look again and yet again, your sight will return to you in a state of humiliation and worn out.
[Noble Quran 67:1-4]
And when some hurt touches man, he cries to his Lord (Allah Alone), turning to Him in repentance, but when He bestows a favor upon him from Himself, he forgets that for which he cried for before, and he sets up rivals to Allah, in order to mislead others from His Path. Say: "Take pleasure in your disbelief for a while: surely, you are (one) of the dwellers of the Fire!" [
We forget, as we were created to forget. And this is a part of our test. Will we only use a selective memory and overlook what we owe to our Creator and Sustainer? Or will we be appreciative even when we are suffering some hardship or setback in this life? As for mankind, whenever his Lord tests him giving him honor and gifts, he says (bragging): "My Lord honors me." But whenever He tests him by withholding his livelihood, he says: "My Lord has disgraced me!" [Noble Quran 89:15-16] Then Allah makes clear to us the real reasoning behind all that is taking place: Nay! But (it is because) you do not treat orphans with kindness and generosity. And you do not encourage feeding of the poor! And you devour inheritance with greed, And you love wealth with abounding love! [Noble Quran 89:17-20]
Source:
http://www.godallah.com/why_create.php
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People say quran is written by man and is not the words of god.
Quran provides us with the test of authenticity and offers challenges against itself to prove its veracity. God says in the holy quran:
"Haven't the unbelievers considered if this was from other than Allah, they would find within it many contradictions?".
"If you are in doubt about it, bring a chapter like it."
[Noble Quran 2:23]
And Allah challenges us with:
Bring ten chapters like it.
[Noble Quran 11:13]
And finally:
Bring one chapter like it.
[Noble Quran 10:38].