He was literally about to bolt for the steps when he saw the door open. Suddenly, it felt like something was rabidly attacking his chest. It took Ron a good moment to realize that it was his heart that was bothering him, not some sort of mad animal trying to do him in. Still, it was a dangerous thing with the way that his heart was reacting to all of this. Ron was slightly fearful of the idea of having a heart attack right on the spot. Taking in a few breaths, Ron ran his fingers through his hair again and met Hermione's smile with a weak one of his own.
"Hi." Getting that word out alone was painfully difficult. Ron didn't know if he was going to be able to manage the rest that he planned on having follow. "Er, can I, y'know, come in? I reckon we've got a bit of talking to do."