it preferences.

WHO SAID I LOVE YOU FIRST

richie: him. it just slipped out tbh. you were having a normal conversation.
"see! this is why i love you!"

eddie: him. he had a fight with his mom and he came over. you had an angry makeout session and then he looked at you and mumbled
"i love you.."

stan: you. you were at the quarry alone and you were gonna jump off the cliff together. instead, you pushed him off and he shouted.
"i hate you, (y/l/n)!!"
you shouted back
"i love you, uris!!"

bill: you. you were comforting him after georgies disappearance. you were cuddling and you just said it.
"bill, i love you."

ben: him. when he asked you out you both hugged and he said it.
"i really do love you, (y/n)"

mike: him. just said it. literally out of nowhere "i love you."

beverly: her. she was crying in her bedroom and you were comforting her.
"i love you, (y/n)"

henry: you. he beat the shit out of someone who hit you at school. when he was done you ran up to him and threw your hands around his neck.
"thank you! i love you!"