SB v BB mentality, or standard play?

[smacksoup]

Villain is unknown.

Party Poker 5/10 (6 max, 6 handed)

Hero is SB with 7 [img]/images/graemlins/spade.gif[/img]9 [img]/images/graemlins/spade.gif[/img]

4 folds. Hero completes. BB checks.

Flop
7 [img]/images/graemlins/diamond.gif[/img]8 [img]/images/graemlins/spade.gif[/img]3 [img]/images/graemlins/club.gif[/img] (2 SB)

<font color="red"> </font> Hero bets. <font color="black"> </font> BB raises. Hero calls.

Turn
5 [img]/images/graemlins/spade.gif[/img] (3 BB)

Hero checks. <font color="red"> </font> BB bets. <font color="black"> </font> Hero calls.

River
8 [img]/images/graemlins/diamond.gif[/img] (5 BB)

Hero checks. <font color="red"> </font> BB bets. <font color="black"> </font> Hero calls.

final pot 7 BB.
questions/comments on all streets appreciated. mostly worried about the river though.

[cookie]

First of all, I raise preflop.

Ill call the river, too.