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The Keeping Up with the Kardashians alum, 38, was "shocked" by the breakup, a source tells PEOPLE, but is now on the rebound.
"The split from Amelia was sudden and unexpected. He was pretty shocked about it. He has slowly been dating, but is not serious with anyone," the insider says. "He seems good though. He is around for his kids a lot. He loves spending time with them."
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Joe Scarnici/Getty; Jean Baptiste Lacroix/Getty Scott Disick and Amelia Hamlin
"Scott and Kourtney are doing okay too," the source adds. "He is still not completely over how serious Kourtney is with Travis. He is trying to let it go though. They want to make the upcoming holidays special for the kids so this is the focus."
Disick and Hamlin were first linked in October 2020 when they attended Kendall Jenner's Halloween-themed birthday bash together. They made their relationship Instagram official in February while celebrating Valentine's Day.
In September, multiple sources confirmed to PEOPLE that the pair had decided to go their separate ways, with one source saying that "Amelia broke up with Scott."
At the time, Disick had just been called out for allegedly shading Kardashian's PDA with Barker in leaked direct messages to another one of the Poosh founder's exes, Younes Bendjima.
The drama took a toll on his relationship with Hamlin, another source said.
"Scott and Amelia are going through a rocky patch," the source said. "It's partly because of the Kourtney drama but also just 'Scott being Scott.' They're not fully over yet, but Amelia isn't happy with him."
After the news of their breakup surfaced, Hamlin shared a cryptic quote seemingly addressing her feelings about the situation.
"Never settle for less. Not with your job, your friends, and especially not with your heart," the quote read. "Continue to seek what you are looking for and do not shrink yourself for the sake of other people. You deserve the best."
Watch: Ask Anna - How do I move on with someone else after a nasty break-up?