[Normally he'd take this moment to start petting his fingers through his hair, but he does not want to disrupt the pretty ponytail, and so settles for running his hand over his back, along his spine gently.]
You don't have to apologize for being happy. [If anything, it makes him feel all floaty and happy to hear it.] I am, too. I didn't think-- I guess I didn't realize how happy I could be.