A heads up 40-80 hand

[NYplayer]

It is folded to me on the button and I look down at Kh4h. The blinds are fairly tight so I raise, only the big blind calls.

Flop: 2s 3h 5d
BB checks, I bet, he calls.

Turn: Ad
BB checks, I bet he calls.

River: 6d
he checks, I bet, he raises.
What should I do, call, fold, or reraise?

I decided to reraise, and now he reraises,
call, fold, or reraise?

[NYplayer]

I decided to call the last bet hoping he has a set or that we split the pot. He turned over KdJd and took it down.

[DocHollyday]

Why do you reraise the river, when a possible flush is on the board? If he raises your bet on the river and you mentioned him rather tight, you should know he has a hand. Even if he had also a 4 like you, there is no sense in a reraise, as you're going to tie anyways. I'd just call down his reraise and hope that my hand would hold up. Apart from the river, you played it allright.