[tobe1st]

i wud say considering the turn check , the most likely hands he can have r 96,99,88; why shud he bet a boat there, u called flop, so it is not likely that u have the 6, if he bets the turn strong u may lay down a draw, if he bets it weak, like 1/3 pot it wud look very supicious
i think a flush wudnt raise on river, a bluff also looks a bit too sophisticated there, i think u can be pretty sure hes made a boat on turn or he hit wit 88 on river, tho i think he may bet turn wit 88 too