Problem sending message on imessage on iphone 4?

I really want my iPhone to send messages to people using only my number and not my email. Today, i unchecked my email on "send and receive" in settings so it was only my number. Now i've rechecked it, logged off and back on and it still won't let me send messages to people with emails instead of numbers like people with iPods. Please help? I want to be able to send messages to my friends with an email and i want it to only send to people showing up as my number. Please don't refer me to any sites! I've been researching all afternoon and i'm really getting tired of it.Id really appreciate any help.

Hold the home button and power button at the same time until your phone restarts