You had been a best friend to Bill when you were young. Meaning you were in The Losers Club.

PRESENT DAY (It’s 1988, you are 12 years old.) Everyone at your house, discussing ideas to take down Pennywise. Bill is leaning on your, Eddie is standing up coming up with ideas, Stan is sitting on the couch behind you, playing with your hair out of boredom, Richie is standing behind Eddie, mocking him (of course) Ben and Bev are sitting beside Stan on the couch behind you.