Middle pair, raised on the river?

[john smith]

Party Poker 3/6 Hold'em (10 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

Preflop: Hero is SB with 8/images/graemlins/club.gif, 8/images/graemlins/heart.gif.
UTG folds, UTG+1 folds, UTG+2 folds, MP1 calls, MP2 folds, MP3 calls, CO calls, Button calls, Hero completes, BB checks.

Flop: (6 SB) T/images/graemlins/club.gif, 7/images/graemlins/spade.gif, 5/images/graemlins/spade.gif <font color="#0000FF">(6 players)</font>
Hero checks, BB checks, MP1 checks, MP3 checks, CO checks, Button checks.

Turn: (3 BB) 3/images/graemlins/heart.gif <font color="#0000FF">(6 players)</font>
<font color="#CC3333">Hero bets</font>, BB calls, MP1 folds, MP3 folds, CO folds, Button calls.

River: (6 BB) 2/images/graemlins/heart.gif <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets</font>, BB folds, <font color="#CC3333">Button raises</font>, Hero folds.

Final Pot: 9 BB

Do I call this river raise? Villian was loose/passive.

[butters]

If he's truly loose/passive, his river raise means he can beat a pair of eights. I hate paying off bad players, so I think your fold is good.

[runa]

I probably prefer the line of bet the flop, bet the turn, check/call the river.

Why didn't you bet the flop? Were you trying for a check-raise?