Are We Friends or Are we More ? ( editing in process)

Niall , Nicky , and Lexi are your typical best friends. Well Nicky and Lexi are sisters and Niall and Nicky are practically in love with each other. But Niall has a girlfriend who he can't stand. What happens when he comes back from One Direction's US tour with the boys and Nicky and Zayn start getting close. Not to mention Lexi and Harry getting together and having to get through the complications of Harry's ex Caroline. Will she be the demise of their relationship? And will Zayn make Nicky fall in love with him before Niall has a chance to admit his feelings ? Well you'll just have to read and see :D