other then being litterally punched in the gut, or being lied to by an ex lover who hadn't told you they had decided to become an ex, the worst feeling to me has always been embarassment, which probably explains a lot about how i am. (and some of the seamingly rediculous lengths i've gone to and things i've done without, in order to avoid it) =^^= .../\...
The worst feeling ever is when you feel like you're not needed and you cant contribute to sth in any way...