This is written like a diary in fact the diary of Harry Potter (this is a drarry "book") but little dose Harry
Know that draco is reading Harry's diary and knows his secret
Draco felt embarrassed that he has to write in a stupid book about his emotions even more so that he was always writing about Harry Potter.
Even though he always writes that he hates Harry.
He knows in his heart that he's lying to himself with every
"dear diary"
he swallows his pride and writes something he never could have admitted to himself until that moment
"I love Harry Potter"