On Messages I can't send under my phone number anymore.
So, I've been using Messages for a while now and everything has been working great. I was logged in under my Apple ID and I had the choice to send them under my email or under my phone number.
Well, all of a sudden my friend messaged me back asking why I was messaging from my email and not my phone number. I have no idea how to fix this problem.
I have logged out and logged back in. I've tried setting things up differently on my phone so that iMessages are only sent from my phone number. I can't think of anything else to do.
And I am aware that iChat is not exactly the correct area to post this question, but there was no way for me to post under a 'Messages' area. This was the closest second.
MacBook Pro (13-inch Early 2011), OS X Mountain Lion (10.8.2)