Im not agnostic, but deeply respect them, they are the most honest of us. I as a beleiver have no way of prooving i am correct... and it is very logically hard to prove a negative so to prove and truly know theres not a god(s) is not possible. "I cant see her" is not a logically sound argument against Her existance.
Aithism is a religion as much as christianity, Judaism, hinduism, shikism, islam, etc... its just faith that there is no god (s) agnostics hold no faith in either stance, logically speaking its the most honest position.