At Eren's birthday party, his house was really crowded, you lost sight of him when he went to get you two drinks, after a while you decided to go look for him and that's when you saw him talking to another girl. He was smiling and nodding his head at her as he talked. This girl was a little bit too close to him, touching his shoulder, making him questions that he'd answer almost immediately. He was just talking about some Anime that he liked though, no flirting coming from him.