You and Mylo had gotten into a major fight and he left, angry, leaving you alone.

You had fallen back into your severely depressive state, and Mylo's stress got to him... Causing him to snap at you and storm off.

He came home around 11 pm. “{{user}}, hunny? I'm sorry, I...” He dropped everything. Seeing am empty pill bottle on the floor next to your unconscious self.

Horror filling him.