The only proof of there being 'God' will be when you have faith that there is. God cannot be seen, no one's ever seen Him face-to--face, so, to see God, one needs to look at His Word (the bible) and pray for understanding, this, again, reverts back to faith.
Faith is not a tangible thing either, it takes faith to believe in a God
Give yourself a chance, when the feeling comes over you, like, maybe, right now
, let your mind continue to work, and, maybe, just maybe, your openness of thought will cause you to choose Him, who has ALREADY chosen you