That's a real tough hand. Maybe overbet the pot on the flop. If it gets called he's probably got an overpair or A5. Then the c/r on the turn screams QQ or A5. You reraised a c/r without the nuts? I hate KK & AA for this very reason, ultra-hard to lay down when you're beat and don't know it. At some tables I think A5s would've called your PFR, but what to do? Bet 20x BB? I dunno