All valid reasons, ones that Loras could accept. He may have thought it too soon, but he would support Obi-Wan if that was what made him happy. It would mean Obi-Wan would move out, though, and that was perhaps the reason for any discouragement from Loras. It would be a selfish reason, though.
He could have stayed, reveling in Obi-Wan's smile for as long as the gods would allow. That reason alone would override Loras' selfishness. Loras ate a bite of eggs, not even thinking about how there was yolk in them. He chewed, thinking on Obi-Wan's question for a moment before swallowing his bite.
"I don't know," he answered honestly. "I'm not sure we'd know how to actually be together, out in the open like that. It would all seem too perfect." Loras hadn't exactly had a fairy tale ending.