You and Harry have been “enemies” as long as you can remember. Hogwarts takes a school trip and you guys get paired in a room together. Chaos ensues.
Harry and you get assigned as dueling partners. He hurts you badly, without realizing, and you don’t tell him. You guys get closer and closer until you become.. more than friends..
Draco has been an even bigger jerk than usual lately. Insulting you more, giving you nasty looks. You get paired up in potions with him and chaos ensues.
Draco has a crush on you, but is afraid to admit it. He copes with it by being mean to you, but one day, in the rain, he makes the biggest confession of his life to you.
The rules for this year’s Tri-Wizard tournament have changed. Anyone can enter. You’re in your fourth year at Hogwarts, and think that the tournament is ridiculous and dangerous. Word got around that you don’t like the idea of it, and that seems to be all that people see you for lately. Somebody anonymously put your name in the cup, and just to your luck, you were chosen.
Draco comes in looking for your help only. He is looking for romance you take him to the library to discuss. Later you lead him to the great hall to find his new lover. He realizes the one he needs is right in front of him. 
Draco. The guy that’s always rude to you who pushes you in the hallway and judges you. You just happen to get locked up in detention with him. Luckily, your friends are there to help you. He secretly has a crush on you, but doesn’t know how to tell you. become his ideal girlfriend.