Bad bluff attempt?

[sakrei]

Villian is 18.4/2/1.6. Was my bluff attempt bad? I don't usually bluff and I'm trying to get better at it. I felt I couldve stolen on the flop, I checked turn because I thought villian was either slowplaying or was weak and would find out on turn (yay position), then I saw his river check and felt he was weak and would fold to a good sized bet, but I was wrong.

Poker Stars
No Limit Holdem Ring game
Blinds: $0.10/$0.25
6 players
Converter (http://www.neildewhurst.com/hand-converter)

Stack sizes:
UTG: $45.25
UTG+1: $31.30
CO: $18.35
sakrei: $25.50
SB: $27.40
BB: $4.75

Pre-flop: (6 players) sakrei is Button with 9/images/graemlins/heart.gif T/images/graemlins/heart.gif
<font color="#cc0000">UTG raises to $0.75</font>, 2 folds, sakrei calls, SB calls, BB folds.

Flop: Q/images/graemlins/diamond.gif 4/images/graemlins/diamond.gif 3/images/graemlins/diamond.gif ($2.5, 3 players)
SB checks, UTG checks, <font color="#cc0000">sakrei bets $2</font>, SB calls, UTG folds.

Turn: T/images/graemlins/diamond.gif ($6.5, 2 players)
SB checks, sakrei checks.

River: 4/images/graemlins/club.gif ($6.5, 2 players)
SB checks, <font color="#cc0000">sakrei bets $5</font>, <font color="#cc0000">SB raises to $10</font>, sakrei folds.
Uncalled bets: $5 returned to SB.

Results:
Final pot: $16.5

[helloimcdog]

I think if youve decided to bluff at this pot you need to do it on the turn and if/when he calls you, give it up. villian did what a lot of good players would do here imo, he knows youre only betting the nuts or nothing, it only costs him a min raise to find out.