You know who I am? (unedited)

KARA'S POV

"You know, don't you? You know who I am?" I asked him not sure if he'd heard or understood what my question meant. 

"Yes," he finally answered after a moment.

There was another long pause of silence as I processed his answer.

Then I turned round to face him as I sat up. "What?! what do you mean you know?" I asked him in surprise. 

He turned to face me too. "I know you're not Kara," he further answered. 

"Why..." I began looking around nervously. "Why didn't you say anything to me?" I asked him in surprise. 

"Well, you didn't tell me either," he pointed out.

"That's because I didn't know how to," I tried to explain myself. "How do you even explain something like this to someone without looking crazy?"

"That's a good point," he replied.

" When did you figure it out?"