The 23-year-old comedian
returned to Instagram on Monday -- after deleting every pic he'd ever posted in the past -- to share a heartfelt and emotional message with his fans in which he celebrated his newfound sobriety.
"Just wanted to let you guys know I'm okay. I know I've kinda been missing, on social media and on the show. I quit drugs and am happy and sober for the first time in 8 years."
Davidson admitted that the journey "wasn't easy," but credited his circle of friends and supporters for helping him stay on track.
"I got a great girl, great friends and I consider myself a lucky man," wrote Davidson, who is currently dating Cazzie David, the daughter of comedian and recent SNL guest star Larry David.
"Remember to never give up hope because sometimes that's all we got," he concluded. "We are a family and I appreciate all your love and support. It's nice to be back in action."
Davidson also paid tribute to his girlfriend, sharing two cute pics of the pair, which he captioned, "Luckiest guy in the world."
Davidson has never shied away from talking about his drug use and his struggles with mental illness. In October, the SNL
star -- who lost his father in the Sept. 11 terror attacks
-- opened up to The Breakfast Club
morning show about his battle with suicidal thoughts when he was younger, and said rapper Kid Cudi's music saved his life.
"I would’ve killed myself if I didn’t have Kid Cudi," Davidson said at the time.
"I would’ve killed myself. Absolutely 100%. I truly believe if Man on the Moon didn’t come out, I wouldn’t be here."