[djhoneybear]

I think bet call is the right line. When CO raises the flop you should put him either on a draw, an over pair or a pair on the board. The turn may have completed his draw but he doesn't seem too excited about it. Its hard to imagine he has an 8 and it looks like a bad bluff attempt. I call every time and expect to win often.

edit -

I looked at it again and it looks like you might be up against a flush. I check/call the river. You are going to get raised only when you are beat but a check might induce a bluff from a weaker hand. This of course assumes that you have no reads on villian being the worst player at the table.