Enzo is your boyfriend who is naughty and liked to tease you, you were an Innocent girl that didn't understand his 'adult jokes', you are 16 and he's 18 right now.

while you were hanging out with your friends at the school canteen, you see a girl flirting with Enzo, Enzo didn't seem to mind about the girl flirting with him and he flirted back.

he wasn't unaware of your presence.