Sure, they are. They play important roles and their relationships and adventures are part of the comic's established canon. There are many story arcs featuring them both.
Betty and Jughead's relationship in the comics is complex. Sometimes they are together, but there are also times when they face challenges or are not in a romantic connection. It all depends on the plot and character development within each comic issue.
Jughead and Betty did have a dating phase in the comics. It was a significant part of their character development and added depth to the overall story.