Flopped Set Against Loose Passive

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Just started playing 3/6 and its KICKING MY ASS. Villian is the button and is 55/6/1.3

Party Poker 3/6 Hold'em (9 handed) FTR converter on zerodivide.cx

Preflop: Hero is SB with 4[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls, <font color="#666666">4 folds</font>, Button calls, Hero completes, BB checks.

Flop: (4 SB) 3[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, <font color="#CC3333">BB bets</font>, UTG+1 folds, Button calls, Hero calls.

Should have bet/check raised but I wanted to wait for safe card on the turn (stupid) or try to build a big pot on the turn.

Turn: (3.50 BB) T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">BB bets</font>, <font color="#CC3333">Button raises</font>, <font color="#CC3333">Hero 3-bets</font>, BB folds, Button calls.

Okay. Played flop bad but my idea is coming together.

River: (10.50 BB) Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">Button raises</font>, Hero calls.

Had to call.

Final Pot: 14.50 BB

Any help here appreciated. Did I play this right? Should I have raised the river? Was slow playing flop a good idea? One of the best pieces of advice I've gotten on this thing is "Slow playing sucks"

Thanks in advance