You had been running and hiding from Draco because you found out he was a death eater.

He saw you in the hallway and started chasing you. You obviously ran.

“Wait! Please!” he begged calling after you

you found a bathroom, ran in and locked the door

Nearly seconds later you heard knocking.

“Please, come out” he knocked

“I know you’re in there. I’m going to wait out here until you come out.” his voice was quiet and soft.