It is not possible to prove God exists, I say this a Christian who believes in God 100%.
I cannot prove God exists to you because only God can prove his existence to you. Not only that but he can’t unless you let him.
I could show you miracles, and you would claim they are fake.
I could show you evidence, and you would dismiss it as false.
I could show the personal experiences of millions, and you would call them all delusional or liars.
God could appear to you in a burning bush, show you his presence, your very ears could hear the sound of his voice. And you would tell me I drugged you and your high.
Until you open up your heart to the possibility that he might exist, and start searching for him with the intention of discovering he’s real. You’ll never know for sure wether he is or not.