NL100: Middle pair played like a draw against donk? Good/bad?

[Akimka]

Villain is 48/10/1.4 (1.5/1.2/2.4)
Wend to SD is 31%
Slowplays TP. His play is very inconsistent... He plays really impulsive.

How's this draw misrepresentation?
I read his $3 bet as weakness and bluffed on river to represent completed FD.

Anyone root for flop-fold?

Party Poker
No Limit Holdem Ring game
Blinds: $0.50/$1
6 players
Converter

Stack sizes:
UTG: $65.31
UTG+1: $101.30
Hero: $97
Button: $337.87
SB: $67.44
BB: $87.50

Pre-flop: (6 players) Hero is CO with 8[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/spade.gif[/img]
2 folds, <font color="#cc0000">Hero raises to $4</font>, Button calls, 2 folds.

Flop: 9[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/heart.gif[/img] ($9.5, 2 players)
Hero checks, <font color="#cc0000">Button bets $3</font>, <font color="#cc0000">Hero raises to $18</font>, Button calls.

Turn: J[img]/images/graemlins/spade.gif[/img] ($45.5, 2 players)
Hero checks, Button checks.

River: 8[img]/images/graemlins/heart.gif[/img] ($45.5, 2 players)
<font color="#cc0000">Hero bets $20.5</font>, Button folds.
Uncalled bets: $20.5 returned to Hero.

Results:
Final pot: $45.5

[The Pokeratician]

I root for him to flop-fold. I like the line if you're giving up for a bet on the turn.