We are all best friends: Jocelyn, Ariana, Harry, Luke, Calum, Niall, Ashton, Zayn, Michael, Louis and Liam. And when we all became best friends, we swore to never let anything ruin our friendship. Yeah, we're a big group, but Jocelyn and I are the only girls, which leaves us with NINE guys. And we're all pretty decent looking, if I do say so myself. For all this time that we've been friends, there have been bromances, fake romances, and a couple of flirty jokes, but nothing serious. But it's still possible for at least one of us to develop a crush. Which is a problem, because you know, that can ruin friendships.
Falling for his best friend was possibly the worst thing that could ever happen to Louis. Especially when they made a promise not to do so, but Louis couldn't seem to keep it from happening. Ending up with a broken heart when Harry suddenly turns up to be in a relationship overnight.
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Or AU where Louis and Harry used to be more than friends, but everything had to change the day Harry introduces Louis to his new girlfriend.