You like somebody but he/she is already with someone. But, sometimes he/she shows that certain interest in you. How do you react to this? What do you do?
I would flirt with him because that isn't bad. At the same time, i would try to make him jealous by either hanging out with his friends or flaunting another guy in front of him. Depending on how much I liked him, I would tell him that I like him and ask him how he feels about me because it seems to me he likes me. But if he didn't like me back or I didn't like him that much, I would just move on but still be his friend.
(please show us a typical outfit you would wear to school)