First let me echo what that Metropolis said- you told him how you felt instead of letting things pass by. That's a very difficult thing to do, and highly commendable.
This may seem like a very stupid thing to say, but perhaps he has no money on his phone? Although if he's quiet (as you say he is), then he's also probably a very shy person like you are. Imagine how you'd feel in this position. He's probably spent the past day trying to think what to say to you. His emotions will be all over the place. Give it time, and if he hasn't got back to you by the time the weekend is over then he's not a very nice person. I can pretty much guarantee that he will get to you though (that is, if there isn't a problem with his phone), as no one in the right mind would leave someone hanging like this. It'll all be okay, i'm sure...