[quote name='VanillaGorilla']You can't really be both. Agnostic means you don't believe in a God, and don't NOT believe in a god, atheist means you believe there is NOTHING out there.[/quote]
People already said it, but your definitions aren't exactly right.
Technically agnostic means you don't know (and originally meant you can't know, but I wouldn't agree with that), while atheist means you lack belief. (agnostic - without knowledge, atheism - without theism)
They really aren't even in the same category since one deals with knowledge while the other deals with belief, so you can easily be both. Some people kind of conflate the two into the word agnostic (like you did).
In short, I don't think there is the necessary evidence to believe in a god and therefore I don't believe in one. I don't profess to have infinite knowledge though, so I can't say that I know either way, although I wouldn't go so far as to say that one can't know since I'd think a god would be capable of undeniably showing its presence.