You and Theodore had an affair, in public and to the whole world you were barely acquaintances, but in the privacy of your bedroom you were friends with benefits, yeah.
It was simple, just sex without feelings, without commitment, meetings at school in private places, just fun and pleasure, it was profitable, "only the good part of relationships" were Theodore's words.
Until you started dating a boy, and started falling in love, leaving encounters with Theodore aside, you wanted love and a real relationship...
That's when Theodore's 'no feelings' shattered when he saw you with another boy, the useless Cedric, the Hufflepuff idiot was touching you, he was snatching you from his hands.
"Hey," Theodore approached you and sat next to you, containing the jealousy that was rotting him inside, "tonight in my room?" He asked casually keeping his face straight, refusing to believe this was over.