5NL6max | am I getting bluffed?

Grabbed by Holdem Manager
NL Holdem $0.04(BB) Replayer
SB ($4.15)
BB ($16.29)
UTG ($1.23)
UTG+1 ($1.68)
CO ($3.22)
Hero ($5.21)

Dealt to Hero A K

UTG calls $0.04, fold, CO raises to $0.16, Hero raises to $0.40, fold, fold, fold, CO calls $0.24

FLOP ($0.90) 9 4 J

CO checks, Hero bets $0.61, CO calls $0.61

TURN ($2.12) 9 4 J 9

CO checks, Hero checks

RIVER ($2.12) 9 4 J 9 4

CO bets $1.59, Hero ?

Villain was 42/25 over 12 hands, so stats are pretty meaningless.
Am I ever getting bluffed in this spot? I guess this is an easy fold, but I just hated it...
Also, please point out, if my play on the other streets was horrible as well.

3b bigger pre. now fold

instead of "am i getting bluffed" just stove a range he might be bluffing with and a range he might be vbetting with. I'd say the only hand bluffing you is QT, and given your small sizing pre he can have 89s 9Ts J9s Jx.