Jughead Jones was cold and reserved, at least to people he didn't know. He kept to himself, and didn't let any stranger come close to him

When he saw you move into Riverdale, he felt something, something he never felt before. That alone was enough to make him avoid you.

So while you saw him around, you never actually interacted. Not that you cared. you were preoccupied with your boyfriend, why should you think about some random boy?