you and Theo have been good friends for a while.

You: you promise not to betray me?

Theo: only a fool would betray a girl like you.

A few day later you heard your family is being hunted by death eaters because of Theo. You decided to take your revenge.

You went through the school and entered the common room while smashing things.

You: F-CK YOU! F-CK YOU!

meanwhile Mattheo and pansy where sitting in the common room watching you when Theo comes running to them and hiding behind them.