godnotgod
Thou art That
Just by the fact that you are interacting with him is indicative that he exists and is certainly as real as you are. If anyone's so-called logic is at fault it is yours.
Who is it that is interacting with who? There is no such 'i' or 'you'. All there is, is interaction, without an inter-actor, in precisely the same manner that there is only whirling water, without a 'water-whirler' otherwise known as 'whirlpool'. If you can show me where this 'I' exists, then by all means, proceed. But no one to date has been able to do so.