The duo, who were first romantically linked in October 2021, ended their relationship this week, a source tells PEOPLE.
"Part of the reason they split was because of their busy schedules," an insider says. "They both travel all the time and it was hard."
E! News was the first to report news of Kardashian, 41, and Davidson's split.
Representatives for both stars did not immediately respond to PEOPLE's request for comment.
Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.
Dimitrios Kambouris/Getty; Frazer Harrison/Getty Pete Davidson; Kim Kardashian
RELATED GALLERY: Kim Kardashian and Pete Davidson's Relationship Timeline
Kardashian later recalled the moment on Amanda Hirsch's Not Skinny But Not Fat podcast in April 2022. "When we kissed, I was just like, 'Hmm!' It was a stage kiss, but it was still like, a little zing. It wasn't anything like a super-crazy feeling. I was just like, 'Hmm,' and then I was like, 'Wow, I really haven't kissed anyone else in 10 years, so maybe I'm just like being stupid and it's just nothing and it's just a stage kiss,' " she said at the time.
The duo then made headlines when they were spotted holding hands on a rollercoaster at Knott's Scary Farm in Buena Park, California, in October 2021, as seen in exclusive photos obtained by PEOPLE.
The two continued to spend time together after Knott's Scary Farm, including when Kardashian traveled to Davidson's native Staten Island, New York, to have dinner at Campania, an Italian restaurant, the next month.
The pair were then spotted out the following weekend in Palm Springs, holding hands and smiling, and continued to stay close in the weeks to follow, even kicking off the New Year with a short trip to the Bahamas.
Want to get the biggest stories from PEOPLE every weekday? Subscribe to our new podcast, PEOPLE Every Day, to get the essential celebrity, entertainment and human interest news stories Monday through Friday.
"Well, I don't really have Instagram — I don't have Instagram or Twitter or any of that stuff. So, most of my daily life is getting into cars and showing up to a set," the comedian said.
"Or, if I'm off, I just either hang with my friends or chill with my girlfriend inside. So I don't do much," he continued, referring to Kardashian with the title publicly for the first time.
Kardashian and Davidson also showed up to the 2022 Met Gala for a starry date night. Though Kardashian's choice to wear Marilyn Monroe's dress might have been controversial, her evening with Davidson was nothing but smooth sailing, with her date showering her with affection and helping her navigate the Metropolitan Museum of Art's famous steps in her formfitting gown.
RELATED VIDEO: Kim Kardashian Says She Hopes to Marry Again amid Kanye West Divorce: '4th Time's the Charm'
Kardashian and Davidson's relationship marked the first for The Kardashians star after her split from Kanye West. Together the pair share daughters North, 9, and Chicago, 4, as well as sons Saint, 6, and Psalm, 3.
The mom of four filed for divorce from West, 45, in February 2021. A source previously told PEOPLE that Davidson was "exactly what Kim needed after her divorce."
"Someone to make her laugh and just have a fun time with," the source said at the time. "The end of her marriage was a very dark time for her and Pete has been the best antidote."