My proof God exists:

• The laws, order and design of nature, humans and the animal kingdom.

•  Accurate history of the gospel accounts and eyewitness testimony recorded.

•  Statistics and probability of created things

• God consciousness, God puts in every person.  Rom 1

• Jesus' existence and resurrection.

• Scriptual prophetic accuracy

• The nation of Israel's existence and resilience

• The fact that there is no other reasonable explanation of things coming into being outside a mind
  (the chance + time myth is nowhere close to reasonable)

• And of course, the word of God

• Last and not least - faith.  My faith doesn't prove that God exists, He exists whether I believe in Him or not.  But my faith is what I have to be able to believe in Him, myself.

Rom 10:17 KJV
So then faith cometh by hearing, and hearing by the word of God.

Heb 11:1 KJV
Now faith is the substance of things hoped for, the evidence of things not seen.

Heb 11:6 KJV
But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.