Thorin could certainly understand where Legolas was coming from, and he certainly did appreciate the kindness that he had shown Bilbo. He would have been heartbroken if something had happened to Bilbo on his way home, so for that reason alone he could admit his gratitude to the Elf. "I assure you that the feelings are mutual" he replied, not even in the least bit concerned about admitting his feelings for Bilbo to others. He had wasted far too much time already, and that was not a mistake he wanted to repeat in their new home. So, he nodded his head in Legolas' direction. "I appreciate it, I truly do" he added, as he watched the Elf make his way back through the house and out the front door.
"It's alright. You being safe is all that matters to me" he added to Bilbo now that they were alone. "It was kind of him to care so much about your safety". They may have had their differences, but even Thorin could admit that much.
The kiss was most welcome, and Thorin returned it as his hand slid down to rest on Bilbo's waist. "And I meant what I said about the feelings being mutual".