In general no, I was not playing scared, but this guy had been playing very steady, betting and calling when ahead post flop (only a few orbits). Stats say 40/10/1 though I didn't have them on me then.
After the obvious cbet, I just got the feeling this was one of those times I don't want my entire stack in for TPTK. I guess that's the definition of playing scared.
Also the Q is a huge scare card on the turn, as AQ was one of the few hands I could have really dominated without that card. If the turn was a low card I was definitely double barrelling here, either way, was always going to bet the river if he checked there.
Poker Room skin
No Limit Holdem Ring game
Blinds: $0.05/$0.10
4 players
Converter
Stack sizes:
UTG: $9.90
Hero: $15.10
SB: $6.40
BB: $18.40
Pre-flop: (
4 players) Hero is Button with
UTG calls,
Hero raises to $0.5, SB folds, BB calls, UTG calls.
Flop:

(
$1.55, 3 players)
BB checks, UTG checks,
Hero bets $1, BB calls, UTG folds.
Turn: 
(
$3.55, 2 players)
BB checks, Hero checks.
River: 
(
$3.55, 2 players)
BB bets $2.5, Hero calls.