What do you think of my plot?

Daisy Green is the popular girl at her rural high school in Northern California, she has it all: the perfect boyfriend (Nate), the designer clothes, and star swimmer on the high school team. When Nate’s brother Finn moves back home from abroad, Finn has his eyes set on Daisy, but Daisy has to stay with Nate even if she does feel something for him. But when Nate slowly starts to drift away from Daisy, and then breaks up with Daisy for a Carolina Holmes, Daisy’s opposite. Carolina is artistic, and quite, and not good at sports. Daisy has long blonde hair, perfect skin, and green eyes, and is unbelievably slender. Carolina is short, has blue eyes, pale freckled skin and medium length crimpy red hair (both girls are pretty, but Daisy is suppose to be the outright beauty, and Carolina is the girl next door beauty). After Nate and Daisy break up, Daisy befriends Carolina unknowing that Carolina is who Nate broke up with her for. While Daisy is upset that Nate and her are apart, Finn moves in to comfort her and they end up falling for each other. When Daisy and Finn are together Nate becomes jealous even though he has Carolina.
It becomes a big ole ‘love square’ (lol rather than a triangle). Sorry if that was confusing :) Give me suggestions commets!!! :D