There is not a simply “you believe or you don’t believe”. That is thinking in black and white. There is no scientific proof to prove either a God does or doesn’t exist. If a person could not be bothered with the existence or nonexistence of a God, then that person would be an agnostic.
I’m quite sure that if we could talk I could prove that you either believe or not. My experience is that often agnostics are just “afraid” to admit one or another.
Also, again, you need proof only to believe.-Scipsy