He wasn't sure if he could fully trust this man - after all, he had been attacked almost immediately after walking in. But, given the situation, he didn't really have much of a choice. He released his grip on Claire, but not before whispering "sorry" into her ear.
"I...you have to believe me. I have no idea who you are. I don't know who Nathan is. I don't even know who I am! I don't understand what is going on here! Whoever you think I am, I promise you I'm not that person. Or, maybe I was. I don't...I just don't know."
He couldn't take it anymore. He couldn't think of anything else he could say, anything else he could do to convince these people. He had thought having no memory was bad, but he had gone through hell in these last few minutes, and it was starting to hit him. He didn't know what was worse - feeling like he hadn't deserved any of this, or wondering if he indeed had.
With the emotion of the moment overwhelming him, he collapsed back down onto the group, and had to fight to keep himself from weeping. Not exactly how you wanted to be acting in front of a cute girl like Claire, but he couldn't help it anymore.
"Please, just, give me a chance. I'll do anything..." He looked up at the man who he knew wanted nothing more than to kill him, essentially throwing himself at his mercy. "Anything...I just need to find out what is happening to me!"