Is this line only in sit-com or universal/applicable in real life? Is "What do you mean" really needed here?

A&B have been "friends" for a while, if not years, even now that they are located far away from each other. B has been eager to maintain the friendship by keeping in contact and offering help whenever possible, while A is kinda carefree or mindless in a way that A never initiates anything but being "polite" when meets B. Until one day…

A: Hey, how are you? Can I visit you? I'm in your city now.

B: You're being hilarious!

A: What do you mean?

B: Well, you haven't responded to my messages or calls for the last few months; you stood me up last time when we scheduled the meetup. Plus, you haven't paid back my money.

My question is, as the audience with omniscient perspective, I have learned that A had been mean(?) unkind(?) not a good friend to B, so could the lines JUST end with "You're being hilarious"? And understandable? What would you say if you were B? (other lines)

Question

Is this line only in sit-com or universal/applicable in real life?  Is "What do you mean" really needed here?

A&B have been "friends" for a while, if not years, even now that they are located far away from each other. B has been eager to maintain the friendship by keeping in contact and offering help whenever possible, while A is kinda carefree or mindless in a way that A never initiates anything but being "polite" when meets B. Until one day…

A: Hey, how are you? Can I visit you? I'm in your city now.

B: You're being hilarious!

A: What do you mean?

B: Well, you haven't responded to my messages or calls for the last few months; you stood me up last time when we scheduled the meetup. Plus, you haven't paid back my money.

My question is, as the audience with omniscient perspective, I have learned that A had been mean(?) unkind(?) not a good friend to B, so could the lines JUST end with "You're being hilarious"? And understandable? What would you say if you were B? (other lines)

bsloan7 · Answer

Yes, “hilarious” is generally a good thing. But in this instance, B is being sarcastic. It’s not meant literally. “You’re being hilarious” is basically another way of saying “you’ve got to be joking”.

B is saying there’s no way A could be serious about wanting to visit considering how badly they were treating B. So A asking to visit is so ridiculous it’s almost laughable.

bsloan7 · Answer

@Pumpk-a-boo I think you’re thinking logically lol, but they most likely had the conversation continue for the sake of the tv show. Nothing can happen if the characters don’t have dialogue or if it stops before the story progresses, you know?

Also, it’s possible that A doesn’t see anything wrong with their actions. So that’s why they asked “what do you mean”.

Also, it’s possible that A doesn’t see anything wrong with their actions. So that’s why they asked “what do you mean”.

bsloan7 · Answer

@Pumpk-a-boo Yeah, I mean you could say it if you wanted to play dumb 😂 but that would just show that you don’t even care that you’ve been treating the other person badly. And that could also be what A was doing as well.