Grindelwald: You broke up over the littlest thing. Well in Grindelwalds point of view that is the littlest thing. For you it was big. You and Grindelwald had been togather for 2 years now. And recently he has started paying less and less attention to you. He rarely give any kisses, rarely comes back to sleep in you're room, rarely eats the food you make and that is making you feel unwanted. You know that he is a busy man but he never ignored you. So you told him that you are breaking up. Grindelwald was angry. He started yelling. You having had enough just ran out of  nurmengard castle and apparated to you're best friends appartment AKA Tina's andd Queenie's. There they welcomed you with warm hugs, hot cocos, gossip and movies.

Newt: There is no reason for you two to break up. You both never have problems with the relationship, not even a little one. 

Tina: She thought you were cheating with a fellow co-worker you were assigned to work with. She was going to visit you at work to give you you're lunch. But when she srrived she witnessed you hugging youre co-worker. And so the first thought that came to her mind was that you were cheating so she left. When you came back home you were met with Tina who eyes help sadnes and anger. All she said was "Leave". Knowing that if you didnt listen to her she would turn the house around. So you left. Not knowing what happened just now.

Queenie:  You had had a small little argumeent. Queenie had told you she has started catching feelings for Jacob again. You never were the type of person to get super jealous, but you felt it bubbling in you're chest. You told her the next day that you both should have a break to let her sort her feelings out. She started crying and begging for you to not leave but you left anyways.