VIDEO : Kourtney Kardashian Dumps Scott Disick Over Constant Partying

Kourtney Kardashian has finally pulled the plug on her relationship with Scott Disick ... kicking her baby daddy to the curb after his partying habits got out of control. Sources say Scott hasn't come home to the family house in Calabasas in over a month and Kourtney lost her patience. As one source put it, "His partying lately has made her make this tough decision."
We're told Kourtney is also frustrated with Scott's friends -- and believes they're enabling his substance abuse. Scott and Kourtney have been together since 2006. They have 3 kids together. It's well-documented that Kourtney and Scott have been rocky over the years -- but we're told, "but now, after 3 kids, it's gotten old and she has to do what's best for the kids."