Perrie recently explained to Metro that One Direction and Little Mix's busy tour schedules are to blame, saying, "I'm guessing so, yes. But after that, once it starts dying down a little bit touring-wise, we'll be able to get into it."
She added that keeping the romance humming along when they're apart so much isn't that challenging: "It makes it a bit more exciting because you don't get to see each other, so when you do see each other, you get butterflies. It's nice. It would be hard if we didn't feel like they were worth it.
We can't wait to see Zerrie's wedding - whenever it finally happens.
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Gallery | Zayn Malik and Perrie Edwards: Disneyland Paris