(Tony did die and the Avengers still were up since Tony left Peter with the Avengers Tower everyone still had missions and still got along but everyone mourned Tony together but Peter didn't)
Peter drowned himself with work he had one of Tony's fancy suits on since he had attended a meeting everyone knew it was Tony's since it was his favorite. Peter had bags under his eyes all he did was work and if he didn't have work it was a mission he'd offer to take. He knew it was unhealthy but he didn't care. Peter was looking through Tony's protocols and saw one "my kid" Peter clicked on it and tears struck his eyes as it stung as his hands were shaking seeing the videos and photos flashing reflecting on his eyes and slowly becoming blurry as the tears fell seeing himself and Tony both smiling at a photo Peter took. Peter saw himself happy in the back of his mind he killed his old self he was sick of waiting for his old self to come back knowing it wouldn't arrive he didn't even regret it.
Peter ignored the worried looks as he went into the kitchen tears track on his cheeks visible his eyes were bloodshot everyone heard the hiccup and saw the shaky hands as he tried pouring the coffee into his mug and him spilling a bit "shit" Peter whispered "I'll clean that up To- Peter" Peter didn't miss Steve almost calling him Tony was he turning into Tony? Peter nodded "thanks" Peter grabbed his mug about to leave "had a meeting today?" Natasha asked "yeah" Peter responded, "what was it about?" Clint asked Peter took a deep breath "uh you know new inventions uh this new thing I'm working on or finishing since he couldn't finish it" everyone hummed "young Peter would you like to watch this uh screen with us! We remembered how you begged us to watch it!" Thor said forgetting the word 'movie.' Peter sighed "another time big guy" Peter was about to walk away till Steve grabbed him and set his mug down "come on Peter" he dragged Peter to the couch "we're watching Star Wars we know you love this movie" Peter smiled a bit he sat in between Thor and Natasha as he laughed quietly in some of the lines in the movies in his mind playing the lines he memorized years ago.
Once the movie was finished the only people who were awake were Peter and Natasha "come on Peter talk to me" Peter shrugged "what? That I'm currently in his home I-I that I'm sitting on the couch he used to sit in? I'm finishing his inventions and creating new ones with his tools. Nat, I get it you are worried but honestly, I don't care okay? My da-" Peter stopped himself breathing heavily trying to keep the tears in furrows his brows "we all know you thought about him as your dad" Peter took a deep breath "yeah I did but it doesn't matter anyway he left me to run the tower so I will... I can't let him down Nat" Peter said whispering the last part.
(Nah big dawgs I cried myself)