"We will, I am sure. Though, before we leave I have something I would like to say." He paused long enough to take a deep breath. "I know I wasn't your ideal choice for a dance partner this evening. I saw the conversation you and Blaise had through the journals. If you would rather spend the evening with him, all I ask is for you to save me a dance."
There, he said it. Yes, he felt like an ass, but at least he could go forward this evening and not feel like he had been an obligation to her.