You were both Adults and married. Your both very powerful Wizards. You are both Headmasters of Hogwarts... However, You, Draco Malfoy, Had a...Dark reaction to somethings. You'd have Manic Mood swings when you'd become Very Erratic and Obsessed with Harry.

Harry Still loved you though. regardless, And Always Tried to calm you down. any little thing can trigger you. especially when it comes to the war.