I think this was a "Sienfield" Episode where Elaine and George were supposed to go see a movie together and George saw it without her and it was a stinker and he was trying to figure out how to not go while at the same time not telling her he already went because she would be mad.
Close but it was actually Jerry who saw the movie with George when he'd agreed to see it with Elaine. George was - as usual - something of a sociopath and persuaded Jerry that Elaine wouldn't mind... up until the point Jerry had bought the ticket. (In this instance Elaine has arguably more right to be mad than the OP, because the reason she isn't with them is because she's looking after a dog that is really Jerry's responsibility)http://www.seinfeldscripts.com/TheDog.htm
George: Know what? Ponce De Leon is sold out.
Jerry: It is? Oh yeah, you're right. What else is playing?
George: Nothing except Prognosis Negative.
Jerry: Boy, I know [Elaine] really wants to see that with me.
George: I mean, I could understand if there was something else playing, but
it's this or nothing.
Jerry: I don't know what to do.
George: What is this 'saving movies' thing? Something's playing, you go.
Jerry: I know, I know.
George: So, what? We're gonna do nothing now, this is crazy.
Jerry: It is kind of silly.
George: Of course it is.
Jerry: I mean, it's just a movie, for god's sake.
Jerry: It's not like she's *in* the movie.
Jerry: Am I supposed to ruin the whole night because she wants to see it? I
mean, if I could have seen it with her, fine. But I can't control all these
circumstances and schedules and peoples' availabilities at movies.
George: And she'll still see it, you're not stopping her from seeing it.
Jerry: How does sitting next to a person in a movie theater increase the level
of enjoyment? You can't talk during a movie. You know, this is stupid, c'mon,
let's just go.
Jerry: Saving movies.
Jerry: Two for Prognosis Negative. I'm in trouble.
George: Oh, you're dead.