There are some interesting assumptions or beliefs in this post that just kinda jumped out at me:
You don’t have to believe in your son or your husband to know they exist. You have absolute certainty that requires no faith. Why invent a male deity and then by a leap of imagination and faith act as if he were real? The next thing is that you need other people, close to you, to believe as well.
If enough people join you the god becomes more of a reality. Talking to him helps keep him alive - of course he will never reply. Everyone needs some illusions to get through life but the god one just doesn’t work for so many people nowadays.
I cannot answer for anyone else who "believes" in God. But being someone who has a personal relationship with God/Goddess/Higher Power, I have to say that I do not believe I invented God any more than I invented anyone else with whom I have a relationship.
But then again, we probably have different definitions of God based on personal experience. My God is not a invisible "male deity" seperate from everyone and everything else. And it is not God's existence in which I "believe" or have "faith" any more (or less) than I have faith in anyone else's existence. To me, God IS existance.
Coming to know God--to see and hear and touch God--isn't always been easy for me nor doubt free. But none of my relationships are.
But why should my having a relationship with someone with whom you don't have a relationship make it any less valid? Why should my being able to communicate with someone with whom you can't or don't communicate make that my illusion? Maybe the illusion of an imaginary relationship with a non-existant being is yours, not mine.
As for prayer, I can tell you that God is not the only one with whom I have shared a two-way mental communication. I have also done so with a friend in the sight of 2 witnesses. (Long story.)
I do not believe in an actual Santa Claus nor in the Tooth Fairy as I have no relationship with them. Perhaps they were invented by imaginative people who wanted to believe in something they had no real relationship with. And maybe that is what some people do with God as well. Or perhaps SC and the TF really exist but are not who we imagine or pretend they are. I don't know. I don't teach my daughter that they are real because they are not real to me and so that would be dishonest and confusing.
I can only teach my daughter according to my own experience of things. There are a few personal "certainties" I can offer her, along with my reasons for them. But I cannot make my certainties her own. Nor will I hinder her from doubting and questioning and living her life on her own terms. I will always assure her of my absolute love, as Jgnat suggested, and share the world with her as I know it, and let the rest unfold and develop as it will. I hope that will not be perceived as "trickery."
I will try to be honest about what I don't know and what I am not sure of also. And admit when I'm wrong, and apologize and make amends when I make mistakes...and whew...I never thought I'd be a parent having to deal with all this stuff...