I don’t get crushes.
That is a line from Jughead Volume Two issue nine.
You know what else Jughead says in Jughead Volume Two (issue eleven page ten if you wanna get real specific)?
“I don’t go on dates, Sabrina. I don’t like people that way, you know?
He didn’t say "I don’t get crushes on girls” or “I don’t like girls that way”. He said he doesn’t get crushes, period. He said he doesn’t like people that way. That’s just about as close to saying “I’m aromantic” as you can get without actually saying “I’m aromantic.”
So in conclusion: Jughead is canonically aromantic and I have the proof on my fucking bookshelf and nobody can convince me otherwise.