The words weren't wrong, but they still took Pietro by surprise. He had a feeling they would have warranted the same reaction no matter how she would have phrased it, because he had not expected it.
"You... Oh." He fumbled with his words, startled at the admission as he turned to her. "I'm sorry, you... Oh."
Stopping in mid stride, he suddenly didn't know what to do. Or say. "I'm... I am flattered, I really am. And you're a beautiful woman, but I am not... I can't. I'm in love with someone else. I'm sorry."