[john kane]

your line is weak. the board is draw heavy but you check flop and call turn, he knows you don't have a monster and likely figured you'd call a bet on the river if he's thinking or bluffing or that you'll fire a value bet so checking again makes sense if he has you beat, hence he check raise instead imo.

whether he has you beat is pretty much impossible to know, but he knows you don't want to be check-raised on the flop and are looking for two streets of value, so he knows that if he feels like making a big move, he can.

as for how i'd play it different, i'd raise turn, your hand is then far wider.