Squad members stick together! Gigi Hadid has started dating Zayn Malik, but her bestie, Taylor Swift, is not on team Zizi yet. HollywoodLife.com has the EXCLUSIVE scoop that Tay is watching out for her friend because she’s worried Gigi will end up with a broken heart! Taylor Swift, 25, normally has nothing but love for her friends. But when she heard Gigi Hadid, 20, was seeing Zayn Malik, 22, she was very concerned for her. Taylor told Gigi to “be careful” with this new relationship with the ex-One Direction member, because Tay is afraid it won’t end well! “Taylor was actually surprised when she found out that Gigi and Zayn were dating,” so was the rest of the world, but unlike Zayn’s fans, Taylor found out firsthand from the source. Gigi actually told Taylor about this new romance, the insider said, adding that Gigi “said it was super casual.” Despite Gigi assuring Taylor that everything was okay, the “Wildest Dreams” wasn’t too thrilled. Taylor thinks her friend should “ta...