[Oh. Yeah, okay, shit. That was a foot in mouth moment there. His expression doesn't exactly fall (you need more facial expressiveness for that) but it does soften a little.

He lifts his hand, hesitant. Then shifts it to grab the hand holding the game cartridge.]

You couldn't ruin our friendship if you tried. You know that, right? I don't want to get too heavy on you or anything, but shit, you know there's no way I'd ever turn my back on you. Not even over Mario Party. You're one of my favorite people.