Did I play this too passively?

[crovax4444]

Alrite, this is my first hand post, so lets see if I'm doing this correctly. Table is very loose, very passive

Party Poker 1/2 Hold'em (7 handed) converter

Preflop: Hero is CO with 3[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, MP2 calls, Hero calls, Button calls, SB completes, BB checks.

Flop: (5 SB) K[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, MP2 checks, Hero checks, Button checks.

Turn: (2.50 BB) 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, MP2 checks, Hero checks, Button checks.

River: (2.50 BB) 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, MP2 checks, Hero checks, Button checks.

Final Pot: 2.50 BB

Basically, at the flop, I checked assuming I would fold. When the turn hit, I still checked down because I was out of position, had a low pocket pair.
At the river, I checked down, still out of position, and still really unsure of my hand.