Addiction
Harry breathed into Hermione's hair. Her scent filled his nostrils and he closed his eyes as the comforting aroma enveloped him. The lemony musk was intoxicating, and even when they had different classes or were on opposite ends of the castle, he still swore he caught whiffs of it. He suspected Hermione did it to torture him.
Said girlfriend giggled and pecked him on the nose, dragging him off to goodness knows where. Harry didn't care. For just a moment in her presence, he would follow her to the end of the earth. He was addicted.