NL 25: OESD with midpair

[Dom88]

Ultimate Bet No-Limit Hold'em, $.25 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

SB ($43.55)
BB ($32.17)
UTG ($28.40)
MP ($25)
CO ($9.23)
Hero ($40.79)

Preflop: Hero is Button with 3[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises to $0.85</font>, SB calls $0.75, BB calls $0.60.

Flop: ($2.55) 5[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">BB bets $1</font>, <font color="#CC3333">Hero raises to $3.5</font>, SB folds, BB calls $2.50.

Turn: ($9.55) K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, Hero checks.

River: ($9.55) 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets $1.25</font>, <font color="#CC3333">Hero raises to $5.3</font>, BB folds.

Final Pot: $16.10

Results in white below: <font color="#FFFFFF">
Hero has 3h 4d (straight, six high).
Outcome: Hero wins $16.10. </font>

67/20/5

i thought i can buy the pot on the flop... is this PFR too weak against a loose blind?