Girl, you should of never done It through a text. But you did it now, and all you can do its wait. Don't text him till he textes you back!..or if yo I do decided to text him, dont bring up at all. Just wait until hes ready to tell you! Then you can say it again to him. Good luck!
He's probably a little surprised to hear that or his phone has died. Most likely the first one. Stop texting him until he answers or talk with him face to face if you see him sooner like nothing happened. Just my suggestion. I've never been faced with a situation like this.