NL 20 Can i fold here?

[paulnic]

hero has $25 villain covers. villain has been involved in a lot of pots, heros image is pretty tight havent been involved much as yet.

Prima Poker skin
No Limit Holdem Ring game
Blinds: $0.10/$0.20
6 players
Converter

Pre-flop: (6 players) Hero is SB with 8[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/spade.gif[/img]
UTG calls, UTG+1 folds, CO calls, Button folds, Hero calls, BB checks.

Flop: T[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] ($0.8, 4 players)
<font color="#cc0000">Hero bets $0.8</font>, BB folds, UTG calls, CO calls.

Turn: Q[img]/images/graemlins/spade.gif[/img] ($3.2, 3 players)
<font color="#cc0000">Hero bets $2.8</font>, UTG calls, CO folds.

River: 3[img]/images/graemlins/club.gif[/img] ($8.8, 2 players)
<font color="#cc0000">Hero bets $4</font>, <font color="#cc0000">UTG raises to $8</font>, Hero???

its always worrying when someone check min raises on the river imo. this is very rarely a bluff.

who folds, calls or raises and why?