He's taking deep breaths. Deep breaths. Hopefully those will be enough to at least fully force the blush off his face so he doesn't look like a total idiot for the rest of the conversation..

So thankfully he at least looks a bit more calmed down again by the time he's listening to what Gladio says.

"But you and Prompto aren't.." He pauses and stops, making a vague (non-dirty, thank you!!) hand gesture. ".. you know? Not just.. friends? That means he must be getting special treatment!"