HEADMASTER: Now, I’d like to know what is actually driving this recent rash of infighting. Oh, goody, I get to guess. Well, let’s see, perhaps you’re arguing over the same boy?
PARIS: Sure, we’re girls, so we could only be arguing about a boy, right? Sexist, white-haired –
Paris rightly complains at the headmaster’s sexist stereotyping that two girls can only be fighting over a boy, but in teen dramas of the 2000s, that’s exactly what happened. Most of the time if two girls fought or didn’t get along, it was because of a boy
In fact, Paris initially disliked Rory because her crush Tristan flirted with Rory, and it was only after Tristan moved schools that their friendship really blossomed. And in this case, they sort of are arguing about a boy – Paris said the thing she couldn’t forgive was that Rory discussed Paris’ boyfriend Jamie with Francie (which didn’t actually happen).
The Annotated Gilmore Girls 