It's a little different. If I say "I have two sons" and you don't believe me, I can prove their existence by showing them to you, showing their birth certificates etc. It is incredibly difficult, if not impossible, for you to prove that they do not exist.
Same thing with God. You say he exists. You're the one who can prove his existence. I have no way to disprove His existence.
No I don't.
I said I BELIEVE he exists, and I have evidence that I think is credible enough to support that belief. Faith is a requirement of Christians. It isn't optional. It isn't factual, but there are facts and artifacts that underline and support the basis of my beliefs.
It is you who says He does NOT exists. You and other atheists. You are sure of it.
There is zero logic to your last message. Not a shred.
Saying 'you have two sons' is not the same thing as me saying 'there is a God'. One is a fact, you have two sons, or it isn't and you do not. I can use other evidence, other facts to prove or disprove that fact.
I believe God exists. I have faith that God exists. I can present evidence: historical, empirical, and circumstantial that He does. I never said, for a verifiable fact, that He does. No one wants to be loved because the object of your affection has a gun to your head. God gave us a choice, and enough proof, and said make up your own mind. Without faith, Christ's sacrifice would have been pointless.
But, all that doesn't matter. I don't say He exists, I say I BELIEVE He exists. You say there is no God. Full stop. Fine. Prove it.
Either prove it, or admit it can't be disproven, and that in the face of that doubt you are truly an agnostic - ready to go where the evidence takes you as your life unfolds.