Although they still "love each other so much," it was too hard to maintain a romantic relationship with their busy schedules. They both shared matching messages on Instagram, showing that they're fully in-sync with revealing the news of their split to the fans.
"We wanted to let all of you know that Zach and I love each other so much, but it's gotten too hard for us to be together with all the distance between us, our hectic schedules, and preparing for our tours, so we have decided its best to just be friends?," the musical.ly star wrote.
"We care about each other so much and will still be the same best of friends we have always been! We don't want you guys to be sad because we feel closer than ever and want you to feel that way towards us too☺️ thank you for supporting us, it was tough to do this but we will forever cherish the moments we spent together! Love you guys❤️."
Even though it's sad hearing that they're no longer together, it's heartening to know that they still care for each other deeply.
Click through the gallery to see more photos of them together.