[ilya]

Tough river spot; I'm really not sure what you should do. One argument for calling is that his big stack makes it psychologically easier for him to bluff here -- he knows that even if you call, he'll still have almost 2000 chips. Also, even if he's not trying to put you on a specific hand, your line probably looks pretty weak to him. You bet the flop in position, which you might do with lots of hands. Then you just called his small turn bet despite all the draws on the board. Plus even if he's not paying much attention, he may still have noticed that you're tight (I presume you are, maybe not?), since he's sitting right next to you.

I dunno. More thoughts later, maybe.

Also, I like a raise preflop with that many limpers.

Also, did you consider raising the turn? That might have prevented him from bluffing the river. On the other hand, it might have prompted a semi-bluff 3-bet, putting you to a tough decision. Also I guess if he just calls turn then bets river the pot might be too big for you to fold.