Christianity may be the largest religion in the world, but it still accounts for less than 30% of the world's population. And very few religions are as polarizing as Christianity (which for the sake of this discussion we're treating as a single unit and not bothering to consider the various divisions within Christianity); would you go to the same effort to disprove Allah? Or Buddha? Or Hinduism? You'll probably say you would, but...of all religions, which one is the most refuted by people of every other religion? Yes, my friend, Christianity is the most hated religion in the world.
Explain this paradox to me: how is it that you admit you CANNOT disprove the possibility of God's existence, and yet you have entered into this discussion with intent to endeavor to prove God does not exist. So, if God does not exist, prove it! And if you cannot prove it, how then can you with a clear conscience try to convince someone else you are right? Because there's a chance that you might be wrong, and a rational mind cannot ignore a possibility that cannot be disproven.
Now, I would wager your immediate response will be to turn that argument around on me. "Ah ha!" You think. "He still can't prove it himself. His argument is as worthless as mine."
In this discussion, my position does not depend on proving beyond a doubt; however yours does. I cannot prove God is real, yet I know that he is. No, I've never seen him...but I've never seen gravity, either. Nor have I seen life. No one has! Gravity and life cannot be seen; we may see things which are affected by gravity, or things which are alive, but the two forces themselves may not be seen. And yet, in spite of them being invisible, because of the evidence they present in our everyday lives, we know they exist...even though we really don't know exactly what they are. What is life? What IS life? What makes something come alive?
The difference between our two arguments is that whereas you must PROVE God's nonexistence, trust in God is not something that relies on seeing and touching; you are correct in that whether or not God is real is something that cannot be proven, from a human standpoint. It must be taken on faith. Which is exactly what the Bible teaches, and where so many men - such as yourself - fall down, because unless you can see the physical presence of God, you won't believe he exists.
Now you will say, "If God truly loved us, he would show himself to us."
Well, suppose he already did?