Just because something can't be proven, doesn't mean there isn't evidences towards its existence. However, you can prove God to be real. Not to others, but to yourself. He says that if you seek him with all your heart, strength, and mind, that you will find him. Many have read the bible, but few have sought him out with everything they have. Those who have however, experience the reality of God. Despite having no physical capability to prove this reality to others, you can experience a real tangible relationship with the creator of all things if you do what he instructs. In science, when someone claims such a thing, you retest to find out whether there is veracity in such claims. That's all I did. Heck, I was even his enemy when I sought him out. He still revealed much to me, and continues to even now that I've given him my trust and faith, but I think you know all this. I hope one day you do seek him though, before it's too late.