Middle Pocket Pair on Paired Flop

[Preytar]

This was in my first orbit so no real reads. I know I was too passive, but I really have problems in this situation. Any help is greatly appreciated.

Party Poker 0.50/1 Hold'em (9 handed) FTR converter on zerodivide.cx

Preflop: Hero is UTG with 9[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/diamond.gif[/img].
Hero calls, UTG+1 calls, <font color="#666666">1 fold</font>, <font color="#CC3333">MP2 raises</font>, <font color="#666666">5 folds</font>, Hero calls, UTG+1 calls.

Flop: (7.50 SB) 8[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, UTG+1 checks, <font color="#CC3333">MP2 bets</font>, Hero calls, <font color="#CC3333">UTG+1 raises</font>, MP2 calls, Hero calls.

Turn: (6.75 BB) 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, UTG+1 checks, MP2 checks.

River: (6.75 BB) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">UTG+1 bets</font>, MP2 folds, Hero calls.

Final Pot: 8.75 BB
<font color="#009B00">Main Pot: 8.75 BB, between Hero and UTG+1.</font>


Brian