Should I raise here?

[giraffeboy77]

Prima Network No-Limit Hold'em, $0.30 BB (10 handed) Hand History converter Courtesy of PokerZion.com

MP3 ($11.17)
CO ($42.58)
Button ($12.40)
SB ($28.95)
BB ($27.60)
UTG ($73.89)
UTG+1 ($14.12)
UTG+2 ($42.97)
Hero ($43.40)
MP2 ($23.57)

Preflop: Hero is MP1 with 7[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/diamond.gif[/img].
UTG calls $0.30, <font color="#666666">2 folds</font>, Hero calls $0.30, MP2 calls $0.30, <font color="#666666">3 folds</font>, SB completes, BB checks.

Flop: ($1.50) 8[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, UTG checks, Hero checks, <font color="#CC3333">MP2 bets $0.3</font>, SB folds, BB calls $0.30, UTG calls $0.30, Hero calls $0.30.

Turn: ($2.70) T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
BB checks, <font color="#CC3333">UTG bets $0.9</font>, Hero calls $0.90, MP2 folds, BB folds.

River: ($4.50) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets $3.14</font>, Hero?

Should I raise on the river? I'm pretty sure I should of raised the turn. I've got no reads on the guy, it's my first round.