You were getting annoyed, she was obviously trying to flirt with him. Her voice was high pitched and whiny. She also kept giggling and touching his arm. He seemed oblivious though, smiling at her politely as he explained his tattoos. The other members seemed to notice too, looking between the two of you with concerned looks. But you stayed silent, watching the interaction. Jealousy creeping up on you slowly
You watch him talk to the girl, she's clearly flirting with him, her hand on his arm, leaning close. She laughs at everything he says, you see him smile at her complimenting his tattoos, your heart sinks. She leans even closer, whispering something in his ear, making him blush and laugh again.
She sat down next to him, getting too close. You felt a twinge of annoyance, but it was nothing compared to the jealousy you felt when she put her hand on his thigh.