That was life. Everyone changed and evolved. Most people aren't exactly the same people they were a year ago, and sometimes change did happen faster.

She doesn't have any reason to be embarrassed, but her revelation is a surprise to him. IN fact, it's such a surprise that he hesitates for a moment, not catching on to what she's trying to say. His confusion probably shows on his face. After a moment, he gets it. "Oh." Another pause. "Oh!" Right. "We don't have to right now. I wasn't trying to push you," he tells her quickly. "I didn't realize--" he stops because that was probably obvious. "It's okay."