Okay so this is everything a huge headcanon me and a friend of mine have… I mean, maybe I spam you a little bit with it??
We’ve always wondered what would have happened if Loki had accepted Tony’s drink. And we thought about Loki getting drunk (lol) and confessing his ‘traumas’ and his problems to Tony, so he decides to kind of ‘adopt’ him. Tony is also alone, so he wins some company, and Loki wins somebody to rely on. He’s kind of heartbroken and his whole life was a lie, so maybe he needs a shoulder where he can mourn. And Tony is the suitable one for this.
So maybe someday he could hear a ‘Thank you’ coming from Loki’s lips.