Porthos doesn't know if he wants to admit it out loud, but he's already sulking a little, his head hung low, shrugging his shoulders. He knows he's going to be easy to read, so it's only putting off the inevitable. "I missed you," is his gruff reply, even though he's not looking at Aramis, because he genuinely might start welling up, if he looks that way.

So he's not going to. He's going to keep fumbling with Aramis' things, which unfortunately results in him sending a few books crashing, making him crouch to pick them up. He's not tired of the fighting, but he's tired of doing it without Aramis at his side.