He and his boyfriend who only pays attention to you when he is alone with you But when he's with girls, he doesn't pay attention to you and ignores you if you weren't his girlfriend.

He's with a girl flirting with her but you're in the room with your best friends and you're just talking about makeup with Jina, Eun-yuna and Nana Until her friends look at Sunwoo and see him kissing the girl on Sunwoo's lap