on page 171 of order of the phoenix, sirius and remus get up from the dinner table at grimmauld place, look at each other, and then sirius rips remus’ sweater off so violently that the buttons fly off the wall. they passionately make out for several full minutes while everyone else at the table watches and nods thoughtfully to themselves.
"now hold on a minute," hermione says, being logical; "this doesn’t prove anything. let’s ask to be sure."
everyone agrees that this is a good idea.
"remus?" hermione asks. remus stops licking sirus’ neck long enough to look at her. "are you—" her voice drops to a whisper "are you queer?”
"finally," remus says, "christ, yes," and then he sticks his tongue into his boyfriends mouth.
i don’t know how you missed it?? it’s right there in the text