The key is talking every day. Aw. Zerrie. The feels. Sigh. Etc...
Perrie recently dished to Key 103 (via Unreality TV) that, though they have busy schedules with One Direction and Little Mix touring, "We just chat every day really. Even if he was in London we'd probably talk to each other on the phone every day anyway."
Perrie did admit that the distance can be a challenge, explaining, "The only thing that gets on my nerves is if something funny happens, like at work with the girls, and I want to tell him about it and then he won't ring until a few days later and I'm like 'oh I had a funny story but now I have nothing to say.'"
She joked, "The moment has gone. It's not funny anymore."
They must have a lot to make up for when they see each other in person though. Wink, wink.