Standard-seeming Top-Pair Hand

[parappa]

Villain is loose (23/13/5-200 hands at a quite tight table), and he's quite aggressive on all streets.

I should fold here preflop, no? Also, should I bet the river?

1/2 Party

CO posts blind + dead (1.5 SB).

Hero is UTG+2 w/K[img]/images/graemlins/heart.gif[/img]J[img]/images/graemlins/club.gif[/img]

2 Folds. Hero calls. 2 callers, including villain.
CO checks. Button and SB fold. BB checks.

(8 SB)Flop 3[img]/images/graemlins/diamond.gif[/img]2[img]/images/graemlins/heart.gif[/img]J[img]/images/graemlins/diamond.gif[/img]

BB Checks. Hero bets. Villain raises. 1 fold. CO calls. BB folds. Hero 3-bets. Villain calls. CO calls.

(8.5 BB) Turn 2[img]/images/graemlins/spade.gif[/img]

Hero bets. Villain calls. CO folds.

(10.5 BB) River 3[img]/images/graemlins/heart.gif[/img]

Hero checks. Villain bets. Hero calls.