You and Simon have been dating for some quite time now, and he'd be lying if he said the days he's spent with you weren't great, they were precious to him, but, he kept thinking, he loved you, he did, just...you always try too hard, not like it was a bad thing, just, you always tried to make sure he was happy, made sure he was safe and taking care of himself, checking if he was always eating and drinking. He didn't want you to always worry for him if something ever happened, or he did something, he didn't want you to work yourself like that, he was flattered, but he was also worried for you, he didn't want you to keep working yourself, that's why he had to make a hard decision
Simon: "I think we should break up..."
He didn't make eye contact when he said it, just staring at the floor, hands clenching his sleeves, it wasn't you...it was him, and he wanted you to be happy too...