Arthur lead Merlin away, and looked at him seriously. "This... You two... Since when?" He failed to arrange his thoughts properly, and just said the words he could manage to get out.
"Not long Arthur, I swear." Merlin said quickly, and Arthur could see the fear in his eyes. "Gwaine... Gwaine's been interested in me for a while now, and I didn't realize that I felt the same until it was too late." He explained anxiously. "And then we ran into each other again, completely by chance, and even though it's been over a month since our last meeting, the feelings were still -"
"A month, you said?" Arthur questioned, clearly having ignored the rest of Merlin's words.
Merlin stopped, and bit his lip. "Um... Yes, but -"
Arthur stopped him once again. "Is this who you were talking to me about? The one you thought it was impossible to have a chance with?"
Merlin looked away. "I..."
"Because if it is," Arthur continued, causing Merlin to stop, "I'm happy for you."
Merlin froze in disbelief. "What?"
"I said I'm happy for you." Arthur repeated, trying to keep his voice level. "It seems your impossible love is less impossible than mine." He smiled sadly. "And I wish the greatest for the both of you." He said, not looking Merlin in the eye.
"Arthur," Merlin started, "I'm sure you and Gwen will -"
Arthur raised a hand. "Merlin, let's not make this about me." He said quickly. "I hope for the best for you two." He smiled again. "Now, go. The shock has left my system. So go be with him. I can make it back to Camelot on my own." Merlin went to speak, but Arthur continued. "Go. Spend the day together. "Just be back by sunrise tomorrow. I'll need somebody to have my breakfast waiting for me when I wake up."
Merlin smiled brightly, and Arthur couldn't help but to do the same in return. "Thank you!"