God does interact with you. You just have to listen! You're not trying hard enough!
And you got it all backwards: "for whoever approaches God must believe that he is"
So first you should start believing, then you can approach God, and then the voices in your head will take over
On a more serious note: yeah, normally friends communicate with each other. One person just talking to an invisible, unheard imaginary friend can not be called communication.
And a collection of ancient letters from that 'friend', written by 40 guys I don't know either, that doesn't help either. Just because there are books in the library doesn't mean I'm friends with all those writers...