Scott Disick broke down in tears as he talked about his loneliness after his split from Kourtney Kardashian in the teased for the Season 11 of "Keeping Up With The Kardashians" which was released on Sunday, Oct. 11.

A tearful Scott responded to momager Kris Jenner's criticisms that he is making her eldest daughter Kourtney sad. The father of three admitted he has made some huge mistakes.

"It breaks my heart to see her in pain," the 19-year-old ex-wife of Caitlyn Jenner said to the father of her three grandchildren, Mason, 5, Penelope, 3, and Reign, 9 months, as she fought back the tears.

"It's been a really hard time going from like, having all you guys, to having nobody," Scott replied, his voice cracking with emotion. "You forget what happens when you're on a binge," Kourtney told her longtime boyfriend.

"I made the worst decision I could ever have made in my life," the 32-year-old self-proclaimed Lord said, before he's filmed walking out of the front door in a dramatic, and final way. His emotional outburst follows Kourtney's similarly tearful reaction on last night's KUWTK, when she admitted she felt close to a breakdown when snaps appeared of her ex looking cozy with former girlfriend and celebrity stylist Chloe Bartoli in South of France back in July.

"When I wake up, I feel sick," the older sister of Khloe, Rob and Kim Kardashian confessed during Sunday, Oct. 11's show. "I'm just literally on the verge of, like, a mental breakdown. I can't believe that this is what my life is at right now. I've worked so hard to keep this family together. It just makes me sad for the kids."

"I can't do it anymore," Kourtney continued. "My mind is completely made up."

The season 11 of "Keeping Up With The Kardashians" is set to premiere on Nov. 15.