They were reunited a few days later in a hallway in SHIELD headquarters, outside an otherwise nondescript door that said Philip J. Coulson.

Few people ever see inside Tony Stark; fewer can stomach what they find; next to no one claims to still like him afterwards. So Tony hides, closing all the doors and battening down the hatches, using charm and confidence as armor when he's not in the suit. To Tony's horror, Steve somehow manages to see inside him anyway.