Louis' pov.
The two week rule. It was stupid at first actually, they both made it up when they were drunk. I mean, you can't just promise that you won't stay away from each other for more than two weeks, right ? It was a joke. Except it was more to them...a comfort, knowing that even if the other one's going somewhere, it won't be for more than two weeks. And just like that, with time, it became more and more important. They would refuse to do anything that meant staying away from each other for more than two weeks. They couldn't explain it, but that rule meant the world to them. Until he broke it.