300NL- Who calls here?

[killphilNI]

Table image- LAGgy, especially in LP
Read- Villain is a nit (impressive too, 15/7/3 over 5Khands)

I have been picking villain's blinds up a lot in LP and feel that he is getting frustrated.

6 handed, effective stacks $300

Hero on BTN A [img]/images/graemlins/heart.gif[/img] 9 [img]/images/graemlins/heart.gif[/img] raises $12
Villain on BB calls

Flop 8 [img]/images/graemlins/club.gif[/img] A [img]/images/graemlins/spade.gif[/img] A [img]/images/graemlins/diamond.gif[/img] ($27)

Villain checks
Hero bets $18
Villain calls

Turn J [img]/images/graemlins/diamond.gif[/img]

Check, Check

River 5 [img]/images/graemlins/spade.gif[/img]

Villain checks
Hero bets $44.......

OK my thinking up to this point.... Villain usually reraises from BB if he's going to play. I think Ax is unlikely and big A are unlikely as he would generally reraise with them pf. I cbet as usual and when villain called I thought a small pp or float were most likely. I checked behind on turn to induce a call or bluff on the river.

Villain shoved river......

I have underrepped my hand big time here and I think villain does not believe I have an ace. I think he is unlikely to have one and I feel like he is trying to take the pot away.