Based on this Awesome post
Peter heard about Loki so much since Thor talks about him. And of course,the New York...let's call it...incident. He wanted to meet Loki ever since Thor started talking about Loki. Weird right? But can you blame him? Even I wanted to meet him.
Peter saw Loki seating in the couch silently with the Thor talking to the Avengers the moment he stepped on the living room of the Avengers tower and began squealing mentally...he's as still as a rock. Loki began looking curiously around the room and noticed him looking at him. He stared at Peter. Peter stared at him. And the Avengers stoped talking because they noticed it. While Tony is freaking out. Mentally and almost physically.
« Peter— » (Tony)
Too late. Too Late
{Hi! I'm Peter!}
[Loki of Asgard]
{Aren't you like...a bad guy?}
[It varies from moment to moment]
{So like...on a scale of one to ten,ten being the worst evil imagineble,like...killing puppies,and one being I'll spit on your hotdog,where are you now?}
[...maybe a three?]
{Cool. Lemme know if it gets above six}
[-thinking- I like him]
The Avengers are all stunned. All of them watch Peter skips out of the room while Loki just leaned forward and grab a book and read.