When I'm With You || Luke Hemmings

Connie and Luke were bestfriends as soon as she moved to Australia.
But, she punks herself out and leaves him for a group of bratty friends.
But why did Connie suddenly feel the urge to go after him after two long months?
What's the fear that's holding her back to confess her love for him?
Why is Luke holding back from loving the only thing he's ever loved?
What happened?