Scott Disick at 1 OAK Nightclub at The Mirage Hotel & Casino in Las Vegas on Dec. 31, 2015. Credit: David Becker/WireImage

That was quick. Scott Disick's new relationship with model Lina Sandberg is over, a source confirms to Us Weekly.

"Lina and Scott are going their separate ways," the source tells Us. "They ended on a good note as friends, and Lina ended it with him."

As Us Weekly exclusively reported on Monday, January 4, it was the first romance for the father of three since his split with Kourtney Kardashian six months ago.

The Keeping Up With the Kardashians star ended her nine-year relationship with Disick, 32, after he was spotted getting cozy with ex Chloe Bartoli in the South of France over the summer. Kardashian, 36, and her ex are parents of three kids, Mason, 6, Penelope, 3, and Reign, 12 months.

Disick has been in and out of rehab for drug and alcohol addiction since his split with Kardashian, and it seems that his ups and downs, combined with his responsibilities as a parent, may have contributed to Sandberg's decision to move on.

"They both have a lot going on," the source tells Us. "He's going to focus on his well-being and being a good dad."

While their fledgling relationship was in the early stages — they'd seen each other a few times in L.A. and were spotted hugging outside the Beverly Hills Hotel this week — Disick was definitely interested in the gorgeous model, who he thought was "really hot," according to another source.

"He did care a lot about Lina," the first source tells Us.

Meanwhile, Kardashian has also been enjoying the single life. Us broke the news last month that the mom of three recently hooked up with Justin Bieber.

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