An offer he can refuse

Peter’s desire to join the Avengers, no matter what it entailed, was the focus of his scenes with Tony Stark. Stark was upset about the ferry battle and the fact that he defeated the Vulture (without killing him, we might add), but he changed his mind.

And this led to an official invitation to join the mightiest superheroes on Earth and Asgard! But, to everyone’s surprise, Spider-Man didn’t accept! He just wanted to remain everyone’s friendly neighborhood Spider-Man for the time being.

What does that mean?

Well, as Tom Holland said, Peter is still a kid. He’ll become an adult in Homecoming 2, so in the Infinity War and the fourth Avenger flick, he’ll still be a bit disoriented, as all kids are.

We can assume that these two events will have a major effect on his actions in Homecoming 2.