The 30-year-old questioned why viewers have not voted him out, after hearing a mixed reaction from the crowd in last night's live eviction.
Speaking with Jay Mckray in the garden, he said: "My head's all over the place at the moment. I don't know what's going on.
"I don't know how I'm being saved if I'm being booed so much. I don't mind walking out to boos, but why am I still being saved? It's peculiar."
The contestant added: "Though, it seemed like universally they'd joined forces to boo me. It's bizarre."
Digital Spy readers have backed Aaron for the reality show crown, while Alex Rose remains the bookies' favourite.
Big Brother's first Channel 5 series comes to a head tonight, airing from 9pm.
> Brian Dowling excited about BB Aaron's final interview
Watch Aaron and Jay ponder the outcome of tonight's final below: