@JJD what are you on about? There isn't any "age gap". It's about two characters, whose life has changed from when they were at university, to now being working adults. The dark haired character is reflecting that they don't have the same opportunities for leisure and commenting that their friends have started to settle down. He's unsure about the future, but the blond character confirms that they will have a future together regardless (using the metaphor of having summer holidays year after year).
@JJD what are you on about? There isn't any "age gap". It's about two characters, whose life has changed from when they were at university, to now being working adults. The dark haired character is reflecting that they don't have the same opportunities for leisure and commenting that their friends have started to settle down. He's unsure about the future, but the blond character confirms that they will have a future together regardless (using the metaphor of having summer holidays year after year).