NL200 Live: River play with flopped nut flush

[ddagt]

Live No Limit Holdem Ring game
Blinds: $1/$2
8 players

My read of Villain: LAG. Would raise any pair, any Ax from any position pre-flop. Seldom limped instead of raised when first one in. Solid play post-flop, would always continuation bet and slow down after that.

Hero had a tight-aggressive/tight-passive image.

Stack sizes: Hero had ~100BB, Villain had ~90BB.

Pre-flop: (8 players) Hero is SB with A [img]/images/graemlins/club.gif[/img]10 [img]/images/graemlins/club.gif[/img]
UTG (Villain) calls, fold, call, fold, CO calls, Button calls, Hero calls, BB checks.

Flop: K [img]/images/graemlins/club.gif[/img] 8 [img]/images/graemlins/club.gif[/img] 4 [img]/images/graemlins/club.gif[/img] ($12, 6 players)
Hero checks. Someone please bet. Checked around.

Turn: 7 [img]/images/graemlins/heart.gif[/img] ($12, 6 players)
Hero bets $10, fold, UTG calls, fold, fold, fold.

Had to bet, hope someone has a calling hand.

River: 8 [img]/images/graemlins/diamond.gif[/img] ($32, 2 players)
Hero bets $15, Villain raises to $45, Hero ?

Didn't like the fact that the board paired, but Villian had been raising preflop with any pairs. Call, re-raise small, re-raise all-in?

Comments on all streets welcome.