Dennis leant back, blinking as Seamus snarled at him. "Wha-" He blinked several times as Seamus looked around like a cornered animal, before eventually stalking off. He watched his friend walk off, still in shock. Obviously the scar was a sore point for some unfathomable reason, but Dennis was a bit hurt - actually, a lot hurt - at the way Seamus had walked away. He felt a tightness grow in his chest as he realised he'd somehow managed to push another important person away from him. He shut his eyes, furiously blinking back tears.
He was vaguely aware of Susan coming up to him and talking to him, patting his arm. He nodded mechanically at the appropriate intervals, not really hearing anything until she said "I don't know that Shay's wards will let you in the flat" which for some reason made him furious. Without saying a word, he disapparated to Rolf's flat.