He was your boyfriend.

Well, atleast it was what he and everyone in school thought, but you didn't think of him as your boyfriend, he wasn't even your friend, he just clinged around you no matter where you went, sometimes he'd even follow you to ‘Woman's toilet’

You were studying for upcoming exam at library, and he was just staring at you and annoying you.

“Why are you even studying? It's so boring.” he picked to see what she was studying.

“Hey, The answer is Sin∅ = 1/Cosec∅.” he corrected.