Monster draw that comes up short (Nl1000)

[Black winter day]

2-5 gbp

Villain is 24/18/2.5.We have a bit of history together - i 3bet/4bet him a ton (most of those were really good hands, but he doesn't know that) and he layed down.Once or twice i just called his 3bet in pos with KK or AA and 3bet the flop.

Cryptologic
No Limit Holdem Ring game
Blinds: $2/$5
6 players
Converter

Stack sizes:
Hero: $516.50
UTG+1: $507
CO: $745.65
Button: $626.70
SB: $1087.70
BB: $118.35

Pre-flop: (6 players) Hero is UTG with 9[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/heart.gif[/img]
<font color="#cc0000">Hero raises to $20</font>, UTG+1 folds, CO calls, 2 folds, BB calls.

Flop: 7[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/spade.gif[/img] ($62, 3 players)
BB checks, <font color="#cc0000">Hero bets $55</font>, CO calls, BB folds.

Turn: 7[img]/images/graemlins/spade.gif[/img] ($172, 2 players)
<font color="#cc0000">Hero bets $155</font>, CO calls.

River: 3[img]/images/graemlins/diamond.gif[/img] ($482, 2 players)
<font color="#cc0000">

Thoughts about:

A) What to do on the turn?
Check-raise?Check-call?
Bet (call obviously)?
With such a huge draw i call anyway, but if i bet and miss, as it happened, i don't have enough left to bet him off.

B) Do you take a shot on the river hoping he has AJ/higher FD?In case he has an Ace, this could be the old "you know that i know that you are commited and i still shove, so i can't really be bluffing, am i?"