why didnt I check behind 100NL

[Grandezza]

Villain is 39/12/5,67 Flop AGF is 8, turn 5, river 4.
dont remember sample but i think it was about a 100 hands.
Full Tilt No-Limit Hold'em, $1 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP ($189)
CO ($75)
Hero ($97)
SB ($72.65)
BB ($100.90)
UTG ($86.60)

Preflop: Hero is Button with T[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises to $3.5</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">BB raises to $7</font>, Hero calls $2.50.

Flop: ($13.50) 7[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, Hero checks.

Turn: ($13.50) 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets $9</font>, BB calls $9.

River: ($31.50) A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets $23</font>, <font color="#CC3333">BB raises to $85.9 (All-In)</font>

i really hate calling preflop 'cause i think im gonna be outkicked a lot but folding seems very nitty. im obv being result oriented in the title i would always valuebet this and get called by his TT-KK