Scott Disick's pals are worried he is ''out of control''.

The 'Keeping Up With The Kardashians' star was spotted getting cosy with stylist Chloe Bartoli, leaving friends ''concerned'' about him and his relationship with Kourtney Kardashian.

A source told E! News: ''They fear he is out of control and has fallen off the wagon.

''He is partying hard and they are concerned.''

Meanwhile, the 32-year-old television personality previously revealed he had ''plans'' to go back to rehab.

He shared: ''The funny thing is, a lot of people were under the impression that I was going to this rehab facility in Costa Rica for a month, when the truth was, I was going for a week for one treatment that they have there. I'm not done. I plan to go back to this place.

''It's an amazing place. It's beautiful and I love it, but I wasn't able to spend three or four weeks there right now. I never planned on it, and everyone keeps telling me that I dropped out early.''

Scott - who has five-year-old son Mason, two-year-old daughter Penelope and six-month-old son Reign with the 36-year-old beauty - also considered posting a photo of his plane ticket to prove he hadn't left the facility earlier than he was supposed to but eventually decided against it.

He added: ''I wanted to actually Instagram or tweet a photo of my tickets that showed that I never intended to stay any longer than I stayed... I'm a work in progress and anything that I can do to better myself, I'm trying.''