It is possible there is nothing behind it, it just is. It just doesn't seem very likely that's all.
I find I agree completely with Krauthammer on this topic, although I agree with him about little else. (I wrote an essay about him once as a seminal neocon for an assignment)
Krauthammer says the idea that humans are able to answer such questions is dubious. And that atheism is one explanation among many, and doesn't seem very likely as an explanation.
http://www.theblaze.com/news/2013/12/23/i-dont-believe-in-god-but-i-fear-him-greatly-krauthammer-explains-his-thoughts-on-religion
“I feel the way that I think Newton once said. I feel like a snail on the side of a great ocean and the idea that I can understand a notion like God or humans can as if we’re expecting a snail to understand the motion of the tides through calculus and physics,” he said.
Krauthammer added, “That’s not possible. So I see the same kind of intellectual gap in the capacity of humans to understand in any deep sense about theology of God as for a snail to figure out how the tides work.”
“I’m not at all an atheist. I mean, of all the possible theologies, atheism is the least plausible,” he said at the time. “I mean, you’ve got to explain the existence of the universe, and to assume it invented itself or created itself is rather odd.”
Krauthammer added, “I mean, the only important question, the most important question is why is there or can there be anything, and how can there be consciousness? Atheism is not an answer that is plausible in any way to me.”
Exactly so. Two weeks ago at church we had an open discussion about whether religion is a crutch. We all agree that it was, but that various things in life can be a crutch. Atheism is a crutch as well, for those who find comfort in a universe that doesn't have meaning. We also discussed whether different kinds of religion can be a crutch more or less. Some tend to think liberal traditions, like Unitarianism or universalism are less crutch-like than more fundamentalist beliefs, but we agreed this may be wishful thinking. Unitarianism has been described as, "the featherbed for the falling Chrisitan".