12/18/2013 at 07:00 PM EST
It's been less than a week since Khloé Kardashian
filed for divorce
from Lamar Odom, and the reality star is making clear that she's in pain over the breakup of her four-year marriage.
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.