Honestly, he kind of wants to cry more. He's not sure if he'll ever be able to stop at this rate.

But Prompto is just.. trying so hard to help him. Inigo can try. He's a little unsure of how to accept that amount of effort being poured into him like that, but he's really trying. Especially Prompto saying he'll be his Crownsguard is really sweet, considering his explanation on what it means.

So he ought to put in a bit of effort here as well.

"We can go play a game." He raises his hand, wiping at his eyes. "You go ahead, alright? Pick something for us to do in the games carriage, and I will be right over. Just.. as soon as I.. you know."

He kind of gestures towards himself. He probably means something along the lines of 'make myself presentable enough after being a crying wreck', but saying that out loud is too embarrassing.