Sounds like he is a real cutie and has stolen your heart already. I really wonder if he is meant to be yours.
Although white cats with two blue eyes are more likely to be deaf and white cats with one blue eye are more likely to be deaf in one ear, this is not a given. However, if this little guy has not been responding to sounds, he may very well be deaf (unless he is just extremely tired and relaxed).
I would do some other noise tests to see if you get any reactions.
Since so many people are looking for that "perfect" kitty, he definitely stands far less of a chance of being adopted if he is deaf.
I don't know if your humane society is no-kill, but if you are unable to keep him for whatever reason, please don't take him anywhere unless it is to a rescue or a no-kill shelter.
"The animals share with us the privilege of having a soul." -Pythagoras
"The soul is the same in all living creatures, although the body of each is different." -Hippocrates
"Let us be loving, hopeful and optimistic. And we’ll change the world." -Jack Layton
"Be the change you want to see in the world" -Gandhi
Kitties: Punky (13), Tweeky (6), and Sassy (7)
1991 to May 24, 2009