"His friends think he is embarrassed by the breakup and that he has to overcompensate by making jokes about their relationship, because, days before they split, he was saying they would never break up,” one source tells ET.
"He's obviously hurt it didn't work out but is doing his best to move on. Anyone would be hurt after an engagement was broken off," a source close to Davidson tells ET. "Pete joked about him and Ariana [when they were together]. So joking about breaking up and their relationship is not new."
"For somebody who claims to hate relevancy u sure love clinging to it huh," she wrote in one tweet, adding in another, "Thank u, next."
Our second source points out that Grande has addressed the split publicly so it's only fair that Davidson does the same.
"Ariana tweeted about their breakup right after the split; why is she allowed to address it publicly, and he’s not? Seems like a double standard," the source says. "He is working to move on, like anyone else would be."
She first concealed one of her multiple tattoos dedicated to her ex-fiance when appearing in pre-taped performance on NBC's A Very Wicked Halloween musical TV special, where she covered up her ink with a band-aid.
For more on the couple's high-profile relationship and eventual split, watch the video below.