Nut flush vs Nut ...period 50 NL

[Tony Montana 22]

CO is a maniac who I recently lost a 2 buy in pot to when my AK ran into 2 pair, after I re-shoved. He is running 82/30 I changed seats a few hands ago to put him on my right.

Oh, and did I mention I was tilted and trying not to fall into the abyss of losing another 2+ buy in pot to him?
I know this isn't the optimal way to be thinking while playing and perhaps I shouldn't even be playing...but I was, and here so here I am.

His Pre flop min raise could mean anything, but his min reraise on the turn means he has a hand he really likes.
I put him on a king, but king what is anyones guess.

What is my action on the river?


Absolute Poker
No Limit Holdem Ring game
Blinds: $0.25/$0.50
5 players
Converter

Stack sizes:
UTG: $53.75
CO: $211
Hero: $138.84
SB: $94.15
BB: $99.30

Pre-flop: (5 players) Hero is Button with :A [img]/images/graemlins/club.gif[/img] :4 [img]/images/graemlins/club.gif[/img]
UTG folds, CO raises to $1 Hero calls, 2 folds.

Flop: :K [img]/images/graemlins/diamond.gif[/img] :J [img]/images/graemlins/club.gif[/img] :K [img]/images/graemlins/club.gif[/img] ($2.75, 2 players)
CO bets $1.5 Hero calls.

Turn: :9 [img]/images/graemlins/club.gif[/img]($5.75, 2 players)
CO bets $6.5</font>, [color=#cc0000]Hero raises to $15, CO raises to $30</font>, Hero calls.

River: :A [img]/images/graemlins/heart.gif[/img] ($65.75, 2 players)
CO bets $80</font>, Hero ?

Results:
Final pot: $225.75