Scott Disick Fears He'll Return to Old Ways While Kourtney Kardashian and Kids Are Out of Town

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Scott Disick confides to Khloe Kardashian that he's "kind of anxious" when Kourtney Kardashian and their three children are not around.

In a promo clip for Sunday's Keeping Up With the Kardashians, the 33-year-old father -- who had a stint in rehab last year -- tells Khloe that he'd like to "book" some club appearances so he doesn't "think about missing the kids and Kourtney." He later admits that being in that sort of environment isn't particularly good for him.

WATCH: Kourtney Kardashian 'Can't Wrap' Her Head Around Getting Back Together With Scott Disick -- 'It Would Be So Much Work'

"You know this is gonna be like the longest I'm away from Kourt and the kids ...ever," he says.

"Are you going to be on your best behavior," Khloe asks. "It's hard to be on your best behavior when you're at a nightclub or at a party," he responds.

Scott says he used to only do the appearances for the paycheck, but adds that he "could probably make money other ways that are healthier."

"I could work on my houses," he ponders. "I’m still going to miss the kids. I just feel like if I went to Europe and did some parties, I probably would totally not think about anything."

"Just make sure you're doing whatever you think is best," Khloe, 32, advises. "Think it through, and don’t just do it because you’re bored."

WATCH: Kourtney Kardashian on Hanging Out With Scott Disick 'as a Friend' -- 'I Don't Feel Like I'm Giving Any False Hope'

“In the past, when Scott had downtime he would book parties and club appearances and nothing good ever came out of that,” Khloe explains. “So, for him to even be thinking of booking a club appearance again really has me worried.”

Last month, a source told ET that Scott is currently single and getting along great with Kourtney, but there is currently no chance of a reconciliation between the two. Although Scott hasn't been going out to clubs all that often, his partying hasn't stopped completely, which the source added is a deal breaker for Kourtney.

WATCH: Scott Disick Might Retire From Nightlife Scene -- 'I Can't Keep Doing This For the Rest of My Life'

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