I read a fic a while back that I've been trying to find ever since~ Steve and Tony are arguing and at some point Steve explodes and shouts something like, "Don't you ever shut up?!" Only it cuts deep for Tony for whatever reason and from that point on he refused to speak. Not just to Steve, but he refuses to speak at all (missions aside). Steve enjoys the silence at first, until he realizes he's really goofed this time and eventually becomes so desperate to hear Tony's voice again that he confronts him in the lab about it and apologizes profusely.
Please, I've been looking for this forever! I'd appreciate any feedback! Thank you everyone!