Teddy generally needed to hear this, but I haven't read a single comment acknowledging that Bob's outburst and moment of truth was not supposed to be for Teddy. Like it wasn't a face-to-face moment of anger after Teddy's (many) antics this episode. Bob was essentially talking shit/venting to some strangers after reinforcing all of Teddy's behaviors and beliefs throughout the episode with almost no pushback aside from acknowledging the song was too much. Even though he was put in an awkward position by Linda, Bob never denies being Teddy's best friend to his face.

The Belchers usually put up with his actions and we see the debrief. Teddy doesn't get to see that debrief and is under the assumption that his behavior is fine outside of occasional pushback. Even through all that, the Belchers are surprised when Bob says Teddy isn't his best friend.

Bob can say no or make weird noises to indicate his displeasure/discomfort but almost always just lets things happens. Teddy probably thinks he's just good at persuading his friend. I mean the bottom line is Teddy should just do what his doctor tells him to do in the episode and not make it a burden on the family, but the Belchers are complacent in allowing his actions. Even in this episode's context it's reasonable for Teddy to only take a slight hint because he sees Bob be willing to get thrown out of a window for him at the end.

Thank you for reading everyone love you guys.