When do I slow down on this?

Villain is 20/0/.18 after 55 hands

PokerStars 0.25/0.50 Hold'em (9 handed) converter

Preflop: Hero is MP3 with J[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">3 folds</font>, MP2 calls, <font color="#CC3333">Hero raises</font>, <font color="#666666">3 folds</font>, BB calls, MP2 calls.

Flop: (6.40 SB) A[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, MP2 checks, <font color="#CC3333">Hero bets</font>, BB folds, MP2 calls.

Turn: (4.20 BB) 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
MP2 checks, <font color="#CC3333">Hero bets</font>, MP2 calls.

River: (6.20 BB) T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
MP2 checks, <font color="#CC3333">Hero bets</font>, MP2 calls.

Final Pot: 8.20 BB