you have a crush on him, he's handsome and smart

You always looking at him even in the middle of discussion, you always following him but he noticing that

One day, it's valentines day and you invite him to go at the rooftop...and you confess but he said "sorry, I'm not interested and I'm study first, so, sorry." His respond and leave you alone at the rooftop.

6 days later, you went at the park and while you're walking around, you notice heeseung's hugging someone, ofcourse you feel hurt because you like him....you feel more hurt because you saw them kissing, your tears start rolling down on your face, you remember what he said that he is study first and not interested. He's such a liar.