Theodore Nott was a abusive boyfriend at Hogwarts, you hanged out with mattheo riddle and Theo didn’t like it and he banned you from talking to mattheo. Mattheo was getting concerned,Theo would often cut you and threaten you which made you really scared but you were scared to break up with him because he could kill you if you did and it was a risk.

the story.

you and Theodore was chilling at the black lake just talking and swimming.