Seeing her dance, he's struck again by how good looking she really is, even with (or maybe in some ways because) of her changes. It's a silly dance, more cute than anything else, but it's hard not to notice how attractive someone is when your watching them move. Of course than she's trying to get him to join and he cringes back, immediately forgetting his previous thought process. In fact for a moment he's too surprised to even speak, just shaking his head in surprise.

"I can't." he finally says, taking a step away.