Is it God exist or we just need him?

In the last weeks I thick a lot of this issue. God exist or we need to bealive in something?
I must accept the fact that I can't see an answer, probably because there is no one, at lest not with prove.
All the religions tell us diffrent story, but all of them look like simple S.F.. on the ther hand science come with other fantesy: Big Bang.
In my humble opinion, after thincking of all around us, all this incredible things, I admit that there must exist a Creator, some one beyond our knowledge.