"Oh, I
feel bad" is a phrase used by people that don't really feel bad, they're just trying to make you think that they are nice and actually feel something for someone else. It's typically used in a very
condescending manner as if to say "that poor creature is so
pathetic".
Nancy: Hey Julie, who is this tard sending me
a facebook friend request.
Julie: I don't know....oh wait....I think he's the
slow kid that use to run around collecting the basketballs in High School. He just sent me a message saying he misses seeing me everyday.
Nancy: Didn't you graduate from High School 20 years ago?
Julie: Yes, creepy....Oh, I feel bad....
Nancy: yeah, right...
sure you do Julie.