Richie

You are Billy's sister.

Billy introduced you to his group of friends only a couple of months ago, but one of them had already taken a liking to you, despite the fact that you were three years older than them all. You were 16. That "one of them" was Richie.

They were recently out for a walk and decided to go to Bill's house. They all walk into his room and see you there. You're sorting through some of his old toys to give them away somewhere.
you turn to them

• Hi, kids. Bill, by the way, Mom told you to come downstairs, she wanted to tell you something.
  While Bill left and everyone else started looking around his room, you continued to sort through the toys, not noticing Richie's interested look.