When we first saw photos of the Kardashian family vacation to Greece months ago, we got to wondering why Rob Kardashian wasn’t making an appearance in any of the photos. On last night’s episode of Keeping Up With The Kardashians, we found out why Rob was AWOL, and it’s not a happy reason.

“I’m so insecure with my weight I don’t want to go anywhere,” Rob told his stepbrother Brody.

Did your heart just break a little bit for sad, sad Rob? Because ours did. Later, Rob admitted out loud that his weight was the reason he didn’t go on vacation with the rest of his family.

“I’m not feeling myself, gaining a bunch of weight,” Rob told his brother-in-law Lamar Odom. “It’s just frustrating to me I’m not happy going out if I’m not in good shape. Within the next six months, if I don’t get this together, then I won’t want to hang around everybody and I want to–so my mom doesn’t cry and think something bigger is going on when it’s really very simple. I need to get [my body] back together and that’s it.”

Kris has been worried about her son, and was trying to get him to see a therapist, but Rob also insisted that things aren’t as bad as she thinks.

“I’m not depressed,” he told Lamar.

Well, Rob, can you blame her for thinking that? Almost getting arrested and avoiding family vacations aren’t exactly the hallmarks of a happy man, and she’s your mother. Sometimes, there's nothing wrong with letting someone give you a little help.