I am an atheist (was a fundamentalist christian for the first 17 years of my life, I am 21 now) because I do not believe there is any evidence to support the belief that God is real. I am completely open to believing in a god, if only there were evidence, what sort of evidence can anyone here provide me? I am terrified of non existence in death (which is what I believe). I am not trying to troll.
When you say, "God is real," what do you mean? As a self-described humanist, what does it mean if something is "real"? If it means quantifiable, empirical, as defined by scientific enquiry, you aren't talking about the same thing that most religious folks have understood as "God."
Basically, these days "reality" is defined by the physical sciences, which in turn is contrasted with "ideas" which is defined by philosophy and theology, and to a certain extent, other disciplines as well. If you have pre-determined that, by definition,
a. God is supernatural, and
b. nothing is outside of nature
then you will never be able to use the cultivated religious terminology meaningfully.
Here is my suggestion. Look at your own experience and your own perspective as it stands. Is there are higher power than yourself? Is there something bigger than you? If so, what is it?
If there is nothing bigger than you, then you are truly an atheist humanist. On the other hand, if there is, then the problem we are having is a matter of semantics. You are defining God narrowly when the "reality" or "idea" is supposed to be interpreted broadly. You cannot inquire into God's existence. If God is anything worth thinking about, he's not a "being" "floating" "somewhere" "above" us. I AM WHAT I AM.
You must determine for yourself whether it is meaningful to call something in your experience "God" and what that means. Forget Christian fundamentalism. It's a dead end, because it tries to fight an unwinnable war, trying to conceive of God scientifically. You have moved beyond that. So don't limit religious thought by what you've already superseded. Expand your mind.