Faith in God is not irrational, though some have claimed that. There is strong evidence to support belief in God, and I bring that to you sometimes. Atheists have their points to make as well. But neither view is actually proved.
A big part of your own decision to believe - or not - goes way beyond evidence and proof, though. Do you want there to be a God? Some decidedly don't. You can choose cynicism. You can choose to say Beauty and Goodness and Truth and Meaning are just illusions. Is that what you want?
The great Dr. John Lennox clarifies the two belief options:
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