Darren was following Ariana right behind with no idea where she was going, he tried asking her but as expected, he got nothing from her. He wasn't mad and didn't complain about it because he deserved all he was getting from her now for being a jerk and messing things up when she gave him the chance to know her better.
Ariana happened to run into Hanna and Astrid on the way and she thanked her stars that she did. More hands were needed on deck, not just hers only. Darren was of no use.
"Oh my God, it's so good I ran into you guys," She sighed with relief, putting a stop to her tracks when she reached them, unaware that Darren followed her behind. She didn't put too much thought into him and thought that he had left when she wasn't responding to anything he asked after she took off, finding out from him about where Nicki was.