There was another trick that Draco had developed along the way to his current state. Pretty girls expected to be noticed. They expected to distract you from whatever you were doing. And so, he made a point of never paying attention to a pretty girl when he was doing something else. He would watch them out of his peripheral vision, but would never give them the satisfaction of a smile while he was talking with someone else.
"Hi Draco," a trio of glamazon witches giggled at him as he spoke with the wizard near Parvati. He merely looked at them briefly and nodded a degree. They looked a little confused as they walked away.
Smirking inside, he finished up his conversation while keeping tabs on Miss Patil. A few more minutes, and he stood alone for a beat before turning to her.