Interesting SB hand

[Philuva]

$10-$20 game.

I have A /images/graemlins/spade.gifQ /images/graemlins/diamond.gif in the SB.

Folded to loose aggressive CO who raises.
I 3-bet in the SB.
BB who I have only seen play about 2 orbits has played only a couple of hands, that is all I know about him.
He thinks for a long time and 4-bets. CO folds and I call.

FLOP is 8 /images/graemlins/club.gif 5 /images/graemlins/diamond.gif J /images/graemlins/diamond.gif

I check. He bets. I call.

TURN 9 /images/graemlins/diamond.gif

I check. He bets. I call.

RIVER 3 /images/graemlins/diamond.gif

I bet. Thoughts?