The "Trainwreck" funnyman sparked concerns for his mental health on December 15 (2018) by declaring he no longer wanted to "be on this earth anymore".
"I'm doing my best to stay here for you but i actually don't know how much longer i can last," Pete wrote, before shutting down his Instagram account.
A host of celebrity friends and fans reached out to the 25 year old with encouraging messages online, while his ex-fiancee, Ariana Grande, reportedly rushed to the New York City studios where the "Saturday Night Live" star was working to offer her support.
At the time, Pete's close friend, Machine Gun Kelly, also told fans he was flying to the Big Apple to check in on the actor.
"im in the plane now on the way to see Pete," he tweeted. "gonna make sure he's good, i promise. can't have my boy in the darkness like that (sic)."
im in the plane now on the way to see Pete. gonna make sure he’s good, i promise. can’t have my boy in the darkness like that.— colson (@machinegunkelly) December 15, 2018
Kelly was spotted in Manhattan two days later, when he was quizzed about Pete's wellbeing, simply stating, "It's just a weird time for us all right now," without elaborating on the meaning of his comment.
However, it appears the hip-hop star has been able to help lift Pete's spirits as he took the comedian with him to Cleveland, Ohio over the weekend, where Kelly had a show at the Wolstein Center at Cleveland State University.
Fans noticed Pete watching his friend's gig from a raised platform at the venue, and shared video footage of the unexpected sighting during Kelly's performance of "Rap Devil" online.
"One of the most beautiful things last night was seeing (Kelly) and (Davidson) on the same stage together," one attendee tweeted on Sunday. "They have a beautiful friendship and it made my heart happy!"
One of the most beautiful things last night was seeing @machinegunkelly and @Petedavidson on the same stage together. They have a beautiful friendship and it made my heart happy! ❤️ pic.twitter.com/voToiQfWrM— Krug 🥀 (@Abby_ltfu) December 23, 2018
The two stars bonded over the summer while filming upcoming comedy "Big Time Adolescence", while Pete was also recruited to feature in the rapper's Loco music video.