I mean in film and TV and literature .
Often at the end of a film depicting a great love story I just think...nah....two years max.
Examples:
Rose and Jack if he hadn’t frozen to death. Would she REALLY have been content with a future cut off from society and spitting and ice-fishing her way round America? No.
Satine and Christian from Moulin Rouge. I know she’s dead (and died very beautifully and romantically from TB too) but if they’d had to leave Paris, rattling through Europe dragging a bird cage, it would be no time at all before she realised there’s no freedom in being dirt poor while Christian writes his book, she’d go back to her tried and tested ways in no time to make a few bob, he’d get jealous and she’d piss off to join a chorus line in London, not as the sparking diamond but a cubic zirconia near the back.
Film Harry and Ginny- he’d realise all those years of playing the field as the chosen one was a missed chance, and he’d move out to his own flat where he’d show off his new Nike AirMax to his bewildered children and boast about crazy nights out in the local bar. Ginny would sniff stoically in a beige trench coat and hold it together for the kids.
I’m sure there are loads more.