updated 12/18/2013 AT 7:00 PM ET
•originally published 12/18/2013 AT 3:30 PM ET
She posted a heartfelt message on Twitter on Wednesday that appeared to address the speculation she’d quickly rebounded into the arms of baseball star Matt Kemp.
“This, in and of itself, is heartbreaking and torture to my soul,” Kardashian, 29, wrote. “Please, I don’t need the extra rumors and BS right now.”
While Kardashian has been spotted out with the L.A. Dodgers outfielder, 29, a source tells PEOPLE that they are “just friends.”
“Khloé is absolutely heartbroken right now [over Lamar] and dating someone is the last thing she’s thinking about,” the source says.