Falling For Your Bestfriend (Niall Fanfic)

Kayla Doyle is Niall Horans very bestfriend, but after Niall leaves for the x-factor Kayla's felt like her life is over, just when se thought she might never see him again, he shows up at her high school graduation. But they both feel something new this time. What is it? Will Kayla forgive Niall? Will they become friends again? Or something more?