bill:
At school , he accidentally dropped his books and other stuff and you saw him so you offered to help him. You introduced yourself and so did he. You walked him home and started to hang out more.
Richie:
he was skateboarding at the park and he kept failing. ( lmao typical Trashmouth ) You were entertained and watched him while laughing.
He caught you watching and attempted to use a pick up line on you , which then again , failed. You introduced yourself to him and you gave him your number. He kept calling you or texting you so you two had a close friendship.Stan:
Your dad and his dad were best friends since they were little. His dad came to visit since they haven't seen each other in a while. He also went with Stan. He introduced you to his son , Stanley Uris and you two were forced to become friends. You then got along well and both of you became good friends.
Eddie:
He was at the pharmacy buying pills. As always. You're always there since your mom works there and you just hang out there a lot. You notice that he goes there a lot. " hey medicine boy , why you always here? " " uhm uhm - " " that's ok. I like you kid. Wanna hang sometime? "
That's basically where your friendship started.