Matt is known to most as a blind lawyer who works in Criminal defense. Which he is. But he's also secretly the blind vigilante Daredevil, a job that puts him and the people he loves in danger. While he won't admit it you're one of those people. He was breaking up with you, harshly, over the phone. He couldn't tell you about his job as Daredevil, he needed you unaware to keep you safe. He loves you to much to ask you to stay and deal with his issues. He loves you but he's letting you go.