I will prove to you that God exists

[Drew_2013]

The universe and natural processes do exist. But they didn't cause themselves to exist right? 

Oh, and how do you know this? 

The evidence of a Creator is the fine-tuning of the universe for life. I just wrote a post detailing some of that.

Circular reasoning fallacy, you are begging the question. Please demonstrate objectively verifiable evidence that the universe is "fine tuned", otherwise I have to remain dubious. The fact we lack a complete explanation for the origins of the universe past the point of the big bang, does not in any way evidence your claim it was created, or required creating. 
And before you posit a deity, you would need to demonstrate sufficient objective evidence a deity exists or is even possible. The claim a deity did it, also has no explanatory powers whatsoever.

I don't believe the universe has been finely tuned, but even if it had, this is not in and of itself evidence for any deity, why would it be?

Read Martin Rees 'Just Six Numbers'. Highly respected scientist and an atheist. He thoroughly details the fine-tuning of the universe and it leads him to claim we live in a multiverse. Its not circular reasoning, scientists could just as well have discovered a wide range of properties and constants could have produced life...but they didn't.