Is God Exists?

I had seen so many online material on Internet which can proof existence of God.

One of them was book posted at http://www.dlshq.org/download/god_exists.htm

But in is book too i was no where able to found any proof that God exists

It is just a matter of faith and trust, but there is no evidence that whether God exists.

The first question which comes in mind is, If yes God exists, then what was the need to create the human beings and different kind of species....

Let say i trust that God exists that we all were created by God, then the question is why it is require to create us, you might answer to nurture the earth and to run the world, then i ask why it is require to run the world, If God exists that is fine.... why God requires to create all those things.

There are lots of question but there is no proper answer to them, only thing which can be said as Mano to Murat, na mano to pathar.
I had seen so many People praying to God and does not have humanity, or "Muh me Ram, Bagal me churi".

What i feel why we define God to have the humanity in ourselves, but now a days people are far away from those things.