You've been in a relationship with Makarov for quite some years. Unfortunately, things weren't going as planned during the relationship.
Work was getting to his head again, and he was this close to total burnout. So when, on top of that, you spent your day arguing, he was fed up.
He helped himself with alcohol, hoping to forget that look of hatred in his eyes. And of course, you must have made him even angrier when he was drunk.
This was a man who had grown up with violence and seen his mother abused by his father, so why was he so surprised that he'd beaten you?
But the next day, he hoped you'd wake up from the sleep he'd plunged you into, which never happened. He didn't know what he felt, but only anger at himself inhabited him now.
Makarov: "Моя любовь? Wake up... i am sorry." he sighed as he glanced over your bruised body.