YFN Lucci and Young Thug got into a social media feud over Thugger’s fiancée, Jerrika Karlae. Sunday, Lucci tweeted Jerrika a message revealing he missed her: “I KNO U MISS LAYING ON DAT SOFA WIT ME GIRL.” Young Thug didn’t find the message to be amusing, and fired back with a photo of Jerrika sitting on his private jet tweeting, “This the only sofa this b**** on!” In response to Thugger’s last message, Lucci posted a screen shot of alleged text messages between him and Jerrika on Instagram, captioning the photo, “U DUMB AS HELL U THINK THATS THE ONLY SOFA #FA***T #WMW2#UNSTOPPABLE #FEB16#LONGLIVENUT4EVA # Young Thug decided to shut down the…