Is it really real?

The questions facing many who have grown up in church since young is whether the whole God thing is really real or whether it is simply self-generated mass psychosis and immagination forged over time. Can we really believe that God is real and that He offers any form of real power and relationship? I close my eyes in prayer. Is there anyone out there? I try to have faith in something I cannot see. Is it really real or but the substance of my immagination? Is faith anything more than positive thinking, making myself see something when there really isn't anything? If there is really power, why dont I feel it or experience it? Somehow, my deepest fear is that I am just faking it, yet I am to scared to face that possibility, lest my hope and faith crumble into dust.