[Nicok7]

When u call on the flop you decide that you are ahead, probably that he his on a weaker kicker or on a flush draw (although unlikely), and that you are going to be deeply involved. Surely then you plan to push on the turn if a favorable card comes along.

When the two comes I would bet, failing that him checking behind me would tell me that either
- He lost interest in the pot or wants to get a way cheap (unlikely to involve this much and then give up, but possible)
- He actually is on a flush draw and his move on the flop sas intending to deceive you and get a free card, wich he did

So when he moves all in on the riverI would definitly put him on a flush, although this time he didn t have it, I think most players will have it.

My play: similar preflop, then raise/fold on the flop: don't want to get too involved so quickly, I would insted reraise all in if it was level 4