Ones with love-hate relationships, say

• Besties who also literally hate each other's guts but we're besties but we hate each other so much it hurts sometimes
• Allies who are also rivals
• Portmanteau for partners who are also competitors
• People in a love/hate relationship?

Wiktionary Word definitions in Wiktionary
alt. (plural of frenemy English) n. (plural of frenemy English)

Wikipedia Word definitions in Wikipedia
Frenemies is a 2012 teen comedy-drama television film and anthology based on the novel of the same name by Alexa Young premiered on Disney Channel . It features an ensemble cast starring Bella Thorne , Zendaya , Stefanie Scott , Nick Robinson , Mary Mouser ...