[Well...he is the person she's seeing. It's not not keeping a secret if he's in on it too, right?]

Oh, that you're very smart, kind and understanding. You're awkward, but in a charming and cute manner that I should take notice from, so I don't just seem plain awkward. Also, your chest is very warm, your kisses cause butterflies (which I was unaware you were some type of druid or mage) and she sometimes wakes up in a fever-like daze from dreaming about your touch.

[He pauses and smiles.] Just the run-of-the-mill stuff.