Pocket 3s, how many mistakes did I make?

[-Spike-]

Disclaimer: forgive me if this post is not very adequate. Still learning here.

PokerStars 0.02/0.04 Hold'em (8 handed) converter

Preflop: Hero is UTG+1 with 3[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, Hero calls, MP1 calls, MP2 calls, <font color="#CC3333">CO raises</font>, Button calls, <font color="#666666">1 fold</font>, <font color="#CC3333">BB 3-bets</font>, Hero calls, <font color="#CC3333">MP1 caps</font>, MP2 calls, CO calls, Button calls, BB calls, Hero calls.

I know 33 is not a strong hand in EP, but there were plenty of overly loose players on this table and I figured it was safe to play up front. If I don't hit, I fold to significan action.

Flop: (24.50 SB) 3[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(6 players)</font>
<font color="#CC3333">BB bets</font>, Hero calls, <font color="#CC3333">MP1 raises</font>, MP2 folds, CO folds, Button calls, <font color="#CC3333">BB 3-bets</font>, <font color="#CC3333">Hero caps</font>, MP1 calls, Button calls, BB calls.

Ok, I catch my set. I figured the BB player to my right had hit the Q but that my set was a significan favorite. I also thought that the 2 flush was enough to pump the pot to make it expensive to keep at it. At this time, the pot is pretty large, so most people are not going anywhere though.

Turn: (20.25 BB) 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">BB bets</font>, <font color="#CC3333">Hero raises</font>, <font color="#CC3333">MP1 3-bets</font>, Button calls, <font color="#CC3333">BB caps</font>, Hero calls, MP1 calls, Button calls.

The MP1 player is very loose as is the button. I don't put them on the straight as the preflop betting would keep me from putting them on that type of hand.

River: (34.25 BB) 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">BB bets</font>, Hero calls, MP1 calls $0.03 (All-In), Button folds.

With 4 to the straight on the board, I backed off a little as any 5 kills my hand now.

Final Pot: 37 BB

Any thoughts as to better way to play this? I assume just fold up front and not even play it.

Hindsight is 20/20 right? lol.