He heard her voice on the phone, and the knock may have startled him, but he stood and opened the door. The flat was a mess, there was shattered plates in the kitchen from his rage, and it looks like he just went on a rampage eating everything and making a mess.
Can you really blame him? The effort to do much other than sit and cry was too overwhelming. When he managed to look up at her from the open door, he looks terrible himself. Messy hair, messy shirt. He looks nothing like he wanted to in front of her.
"Y-y-you didn't have to come..." Tried to wipe his eyes of the tears, biting his lip hard.