folding top pair on river

[moodifier]

First orbit at table plus I aint great at reading folks, I usually just try to see what hands they play and from what position.

Perhaps I shouldve raised the turn? Comments on all streets welcome.

Paradise Poker 0.50/1 Hold'em (7 handed) converter

Preflop: Hero is Button with A[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/spade.gif[/img].
<font color="#666666">2 folds</font>, MP2 calls, <font color="#666666">1 fold</font>, Hero calls, SB completes, BB checks.

Flop: (4 SB) T[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">BB bets</font>, <font color="#CC3333">MP2 raises</font>, <font color="#CC3333">Hero 3-bets</font>, SB folds, BB calls, MP2 calls.

Turn: (6.50 BB) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">BB bets</font>, MP2 calls, Hero calls.

River: (9.50 BB) 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">BB bets</font>, <font color="#CC3333">MP2 raises</font>, Hero folds, BB calls.

Final Pot: 13.50 BB