Jarchie

Jarchie is the slash ship between Jughead Jones and Archie Andrews on CW teen mystery drama Riverdale.

Canon
Rift

Jughead and Archie have been best friends since they were kids, but a rift between them occurs in the summer before their sophomore year, partly because, unbeknownst to Jughead (or anyone), Archie has an affair with Riverdale High's music teacher, but mostly due to the secret Grundy and Archie keep that they were at Sweetwater River on 4 July and heard a gunshot. Jughead is visibly wounded that he doesn't recognise his former best friend, but is still willing to give Archie advice about Betty.

When Jughead sees Archie and Grundy together he confronts Archie, who tells Jughead about what they heard on July 4. Jughead undelines the severity of the situation, imploring Archie to tell the authorities and to realise that Grundy is just using him. Archie basically threatens Jughead not to tell anyone, at which Jughead is appalled. Reggie accuses Jughead of having killed Jason and Archie steps in between them and tells Reggie off, leading to a fight. Archie decides to come clean and apologises to Jughead for how he treated him, to which Jughead replies they'll mend it over time and their friendship starts anew.

Rivalry

Although Archie rejected Betty, Jughead feels guilty after kissing Betty and she becomes an unspoken point of contention between the two formerly close friends, who struggle to adjust to this new development. Archie notices that they've gotten closer and tries to ask Jughead, who seems nervous about what it will do to their friendship.