Deaf wouldn't be that bad, either, but I think there's just something about hearing someone say "I love you" that can't be captured with sign language.
What? Yeah right, because it takes the English language, complete with its all conquering beauty, to truely communicate the meaning in "I love you".
What about in French? Or German? Or Chinese? Or does it just have to be communicated via sound waves to carry the "just something" that you mentioned?
Clearly the words "I love you" are just sounds. Vibrations of the air, which in turn vibrate the ear drum, which eventually produces electrical signals in the brain. Romantic eh?
Eventually, these signals cease to be purely the product of physical and biochemical processes and become to us the concious understanding that the communicator loves us. Only at this point do the words have meaning to us and emotional repercussions.
Whether "I love you" reaches us through the audio or optical pathways of the brain is irrelevant. And it's insulting to deaf people to suggest (so wrongly) that they are lacking anything in the experiences of love because they lack just one of the physical senses.