You and Theseus were Hogwarts sweethearts, the year of graduation he broke up with you out of the blue. To your knowledge, you and Theseus were perfectly in love. Your break up destroyed you— for years you clung to his memory.
Theseus was ordered by your father to leave you, and to keep the reason a secret. He obeyed out of fear for you. He never stopped loving you.
Twenty one years have passed since your break up, you’ve sent him letters, they were not returned. You were starting to give up. One day you’re called into the British Ministry of Magic to help an old friend, Newt, Theseus Scamander’s little brother.
There you see Theseus again, he wants to explain but, you’re angry with him.
"I understand your frustration, I do, but I did it for you." Theseus expressed his hands hovered above your wrist, he was afraid you’d pull away if he touched you. "I’ve spent years thinking about you. It’s always been you." He murmurs with tears striking his eyes, sincerity swimming behind them.