How do I deal with the belief that maybe... Just maybe... God exists and I'm...

[Angrboda]

Book of Numbers (KJV)
22 And God's anger was kindled because he went: and the angel of the Lord stood in the way for an adversary against him. Now [Balaam] was riding upon his ass, and his two servants were with him.

23 And the ass saw the angel of the Lord standing in the way, and his sword drawn in his hand: and the ass turned aside out of the way and went into the field: and Balaam smote the ass, to turn her into the way.
24 But the angel of the Lord stood in a path of the vineyards, a wall being on this side, and a wall on that side.
25 And when the ass saw the angel of the Lord, she thrust herself unto the wall, and crushed Balaam's foot against the wall: and he smote her again.
26 And the angel of the Lord went further, and stood in a narrow place, where was no way to turn either to the right hand or to the left.
27 And when the ass saw the angel of the Lord, she fell down under Balaam: and Balaam's anger was kindled, and he smote the ass with a staff.
28 And the Lord opened the mouth of the ass, and she said unto Balaam, What have I done unto thee, that thou hast smitten me these three times?
29 And Balaam said unto the ass, Because thou hast mocked me: I would there were a sword in mine hand, for now would I kill thee.
30 And the ass said unto Balaam, Am not I thine ass, upon which thou hast ridden ever since I was thine unto this day? was I ever wont to do so unto thee? and he said, Nay. 

So what's the moral of that story?

That people in the bible were stupid. A talking ass is worth its weight in gold!