Blaise Zabini.

You are in fifth year Slytherin, You and Blaise have been best friends since before Hogwarts, in second year you started to like him, you didn't know that he liked Abril Candel, Your best friend from Hufflepuff.

They are both in the common room alone –Hey... Do you know if April likes anyone?– he asked blushing
–No, why?–You ask distractedly in your book when you are surprised–You like April!–you pretended to be happy but inside, you were broken...

Blaise likes Abril Candel...