scare card on the river - bet or check?

[madscratch]

3rd or 4th hand on this table. I know the player to my right is very loose, but that's about it.

I feel pretty good about this until 5th street. I checked it. Should I have bet?

Ultimate Bet 0.50/1 Hold'em (5 handed) converter

Preflop: Hero is Button with 8[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img].
MP calls, Hero calls, SB completes, BB checks.

Flop: (4 SB) 4[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, UTG checks, MP checks, <font color="#CC3333">Hero bets</font>, SB calls, BB folds, UTG calls, MP calls.

Turn: (4 BB) 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, UTG checks, MP checks, <font color="#CC3333">Hero bets</font>, SB calls, UTG calls, MP calls.

River: (8 BB) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, UTG checks, MP checks, Hero checks.

Final Pot: 8 BB