If you believe your relationship is worth saving... how close are you to his mother? Maybe a nice note telling her you're really sorry, you didn't mean what you said, and that you were just having a bad day or something. If you feel you need to do damage control immediately, use email, otherwise send a card or letter via snail mail.
You should also drop a line to your bf saying something like "look, I'm unhappy about how our relationship is going, I said some things I didn't mean, etc." Be honest.
If you don't believe your relationship is worth saving, then break it off.
Oh, and in either case, get a new cell phone. Or at least get rid of the voice activation thing.
